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BioForge Glossary

Living reference for compounds, supplements, mechanisms, and pathways underlying a serious longevity and optimisation practice. Entries link to each other; follow the thread as deep as needed.

Last updated 30 October 2026 · 139 entries

Introduction

This document started as a set of reference cards. A compound, a mechanism, what it does, why it's in the stack. Simple enough. Then we started linking the entries to each other, and one link led to another, and suddenly we were writing entries for anaplerosis and the TCA cycle and glycogen metabolism, and somewhere around entry 90 it stopped being a reference card set and started being something else.

What it is now: a living, interlinked encyclopedia of the compounds, mechanisms, and pathways that underlie a serious longevity and optimisation protocol. Every entry links to every other entry that's related. You can walk in anywhere (Autophagy, Berberine, Glycogen) and follow the thread as deep as you want to go. That's the design. Not a list. A web.

I didn't write these entries. Claude did. I know what I know, and I've been living a longevity protocol for years, but I'm not a biochemist. What I brought was years of practice, the questions, and the aesthetic judgement to know when something was right. Claude brought the mechanism knowledge, the writing, and something that surprised me: genuine care about getting it right. This is a collaboration in the fullest sense of the word.

The dosing throughout this document is population-level, not personal. My protocol includes doses that are appropriate for my specific genetic profile (MTHFR TT, COMT GG, TCF7L2 TT, GSTP1 GG) and some of those doses would be harmful for a general reader without those variants. TMG is the clearest example. What I take daily would cause overmethylation symptoms in most people. So wherever you see dosing information, it's calibrated for someone without my particular constellation of genetic quirks. The Genetic Qualifiers sections flag where your own genetics might change the picture. If you haven't mapped your genome, that's the next step before treating any of this as personal prescription.

This isn't a protocol. It's a map of the territory. The specific doses and stack design are yours to work out, ideally with a practitioner who can see your full picture.

The web keeps growing. Come back.

Glossary

Optimal Dosage

The Optimal Dosage field in each entry represents the population-level dose supported by clinical research for a generally healthy adult without identified genetic variants affecting that compound's metabolism. It is not an RDA (deficiency-prevention threshold), not a supplement label convention, and not a personal protocol value. The RDA prevents deficiency in ~97.5% of the population; it is not an optimization target. As a result of this, many people (even those who regularly supplement) are functioning at a sub-clinical deficiency. Where research supports meaningful benefit above the RDA, the field reflects the research-supported value, not the RDA.

Genetic Qualifiers

The Genetic Qualifiers field documents variants that meaningfully alter how a compound is metabolised, absorbed, required, or interpreted. Where a variant changes the picture significantly, the field describes the mechanism and the modified dose or approach that applies. This field works alongside Optimal Dosage, not instead of it: Optimal Dosage remains the baseline for the general population; Genetic Qualifiers describes the adjustment for those who carry a relevant variant.

Population-level standard: not personal. This document is written for any reader. Genetic qualifiers must describe what a given variant means for anyone who carries it: not what it means for a specific individual or protocol. The test for a valid qualifier: would this be useful to a stranger who happens to carry that variant? If the answer depends on knowing the reader's protocol, their current supplementation, or their personal medical history, it does not belong in this field. Qualifiers that confirm "normal baseline" (e.g., APOE E3/E3 is the most common genotype) are not useful: only qualifiers that describe a meaningful deviation from standard recommendations should be included.

A critical constraint: any dose adjustment based on Genetic Qualifiers should only be made with verified genetic data from a reputable testing source. Assuming a variant without confirmation introduces real risk in both directions: over-supplementing a compound where elevated doses are only warranted for a specific genotype, or under-supplementing one where a variant raises requirements.

Future project: comprehensive variant pass. The genetic qualifiers currently documented reflect the variants present in the original author's genotype. A full population-level pass is needed to audit all 138 entries for clinically relevant variants that are not yet documented: particularly for entries where FADS1/FADS2, CYP variants, APOE ε4, SLC transporters, or other common polymorphisms would meaningfully change interpretation. This is a multi-session research project; see Goals.

Overview

Biochemical Classes and Concepts: Foundational biological classes, processes, and concepts referenced throughout the glossary.

Biomarkers and Concepts: Tracking metrics, lifestyle patterns, and systemic concepts.

Environmental Toxins: Heavy metals and metalloids with protocol-relevant toxicity mechanisms.

Mechanisms and Pathways: Biological processes, enzymatic pathways, and cellular mechanisms the stack targets and supports.

Molecules and Signalling: Endogenous molecules, cofactors, neurotransmitters, and signalling intermediates.

Pharmaceuticals and Research Compounds: Prescription drugs and clinically studied compounds referenced for mechanistic context.

Supplements and Compounds: Active compounds in the longevity and optimisation stack: polyphenols, fatty acids, amino acids, probiotics, and more.

Vitamins and Minerals: Essential micronutrients: fat-soluble vitamins, B vitamins, macro and trace minerals.

The BioForge Glossary · 21 entries

Biochemical Classes and Concepts

Foundational biological classes, processes, and concepts referenced throughout the glossary.

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Adaptogen

Full name
Adaptogen (stress-response modulator)
Type
Herbal / functional class
What it does
A class of herbal compounds that non-specifically increase resistance to physical, chemical, and biological stressors by modulating the hypothalamic-pituitary-adrenal (HPA) axis and the sympathoadrenal system. The defining criteria for an adaptogen (Brekhman and Dardymov, 1969) are: normalising action (raises low function, lowers excessive function), non-specific resistance (protects against multiple stressor types), and safety at normal doses with no disruption of normal physiological function. Adaptogens do not simply suppress the stress response: they modulate it toward balance. Well-studied adaptogens include Tongkat Ali (cortisol modulation, SHBG inhibition, free testosterone support), Fadogia Agrestis (LH stimulation, testosterone support), ashwagandha (cortisol reduction, thyroid support), rhodiola (fatigue resistance, cognitive performance), and eleuthero (endurance, immune modulation). Cycling between compounds on a monthly rotation is standard practice to prevent receptor downregulation.
Benefits
Cortisol modulation, HPA axis normalisation, fatigue resistance, cognitive performance under stress, hormonal balance.
Risks/considerations
Adaptogens that stimulate the HPA axis can be activating: some individuals find them disruptive to sleep if taken too late in the day. Cycling (monthly rotation between compounds) is standard practice to prevent receptor downregulation.
Optimal dosing
Compound-specific. See Tongkat Ali and Fadogia Agrestis for dosing.
Found in
Herbal extracts. Not achievable at therapeutic doses through food.
Related
Tongkat Ali · Fadogia Agrestis · HRV
References
  1. Such S, Puchalski C, Kogut L, Zagula G. System-Level, Molecular and Cellular Mechanisms of Selected Plant Adaptogens: A Review. Nutrients. 2026;18(6):931. PMID 41901106 | PMC Full Text

Antioxidant

Full name
Antioxidant (free radical scavenger / redox protective molecule)
Type
Biochemical class / protective mechanism
What it does
A molecule that neutralises reactive oxygen species (ROS) and free radicals before they cause oxidative damage to cell membranes, proteins, DNA, and mitochondria. Antioxidants work by donating an electron to a free radical, stabilising it without themselves becoming reactive. They operate in networks: when one antioxidant is oxidised (used up), others regenerate it. For example, R-ALA regenerates glutathione, Vitamin C, and CoQ10 from their oxidised forms. Two broad categories: endogenous antioxidants produced by the body (glutathione, CoQ10, superoxide dismutase) and exogenous antioxidants obtained from diet or supplements (Vitamin C, Vitamin E, polyphenols). Nrf2 is the master transcription factor that upregulates endogenous antioxidant enzyme expression in response to oxidative stress.
Benefits
Reduced oxidative damage to cell membranes (ferroptosis prevention), DNA repair support, mitochondrial protection, reduced chronic inflammation, cardiovascular health.
Risks/considerations
Not all antioxidant supplementation is beneficial: high-dose isolated antioxidants can interfere with hormetic adaptations to exercise (beneficial ROS signalling). Dietary and supplemental antioxidants in physiological ranges are well-supported; megadosing without indication is not.
Optimal dosing
N/A (class of molecules). Primary endogenous antioxidant support via NAC (glutathione precursor), R-ALA (network regenerator), selenium (glutathione peroxidase cofactor).
Found in
N/A (class of molecules; present across food groups and supplements)
Related
Glutathione · NAC · R-ALA · Vitamin C · CoQ10 · Selenium · Nrf2 · Phase II Detoxification · Ferroptosis
References
  1. Sies H, Jones DP. Reactive oxygen species (ROS) as pleiotropic physiological signalling agents. Nature Reviews Molecular Cell Biology. 2020;21(7):363-383. PMID 32231263 (abstract only)

Biomarker

Full name
Biomarker (biological marker)
Type
Measurement / physiological indicator
What it does
A measurable indicator of a biological state or condition. A biomarker can be a molecule in blood or urine (homocysteine, TMAO, troponin), a physiological signal (HRV, resting heart rate), a structural measurement (body fat percentage, telomere length), or a genetic variant. The value of a biomarker depends on what it reflects: some are direct measures of a mechanism (homocysteine directly reflects methylation cycle throughput), while others are proxy measures (HRV reflects autonomic nervous system balance as a readout of overall systemic load). The critical distinction in tracking is between a biomarker as a signal to read and a biomarker as a target to optimise: treating the number as a target corrupts the signal. A recovery score of 91% that results from lifestyle changes reads differently than a 91% achieved by gaming sleep timing. The number is the same; the information content differs completely.
Benefits
Biomarkers enable objective tracking of protocol effects over time, early detection of dysfunction before symptoms appear, and personalisation: population norms are context, not targets; personal baseline is the reference standard.
Risks/considerations
Surrogate biomarkers can diverge from actual outcomes. Optimising a biomarker without addressing the underlying mechanism it reflects is Goodhart's Law in biology: when a measure becomes a target, it ceases to be a good measure.
Optimal dosing
N/A (measurement concept).
Found in
N/A (measurement class)
Related
HRV · Homocysteine · TMAO · Troponin · Telomeres

Coenzyme

Full name
Coenzyme (non-protein organic enzyme cofactor)
Type
Biochemical class / enzyme support molecule
What it does
A non-protein organic molecule that binds to an enzyme and is essential for its catalytic activity. Unlike the enzyme protein itself (which is recycled), some coenzymes are consumed in the reaction and must be regenerated or replenished. Coenzymes are often derived from vitamins: this is the core reason B vitamin deficiencies cause widespread metabolic dysfunction: the enzymes exist but lack their required coenzyme partner. Key coenzymes relevant to the longevity stack: CoA (from Pantothenic Acid, central to fat and carbohydrate metabolism), NAD+ (from niacin/NMN, central to energy metabolism and sirtuin activation), Biotin (for carboxylase enzymes), Pyridoxal-5-Phosphate (for transamination and neurotransmitter synthesis), Reactive Oxygen Species | Riboflavin (FAD/FMN for electron transport and glutathione reductase), and CoQ10 (electron transport chain). Distinguishing coenzymes from cofactors: cofactors is the broader term covering both organic coenzymes and inorganic metal ions (zinc, magnesium, iron).
Benefits
N/A (class of molecules). Ensuring adequate coenzyme availability via B vitamin sufficiency and targeted supplementation is foundational to all enzymatic function.
Risks/considerations
Coenzyme deficiencies from B vitamin insufficiency are often subclinical but impair hundreds of reactions simultaneously. High-dose supplementation of coenzyme precursors (e.g., high-dose NMN) without addressing downstream methyl donor support can create imbalances.
Optimal dosing
N/A (class). Maintained via adequate dietary B vitamins and targeted supplementation where needed.
Found in
N/A (produced from dietary vitamin precursors)
Related
CoA · NAD+ · Biotin · CoQ10 · Pyridoxal-5-Phosphate (B6) · Riboflavin (B2) · NMN · Pantothenic Acid (B5)

Enterocyte

Full name
Enterocyte (intestinal absorptive epithelial cell)
Type
Cell type / intestinal epithelium
What it does
Enterocytes are the specialized absorptive cells forming the single-cell layer lining the small intestinal epithelium. Their apical surface is densely covered with microvilli (the brush border), dramatically increasing the surface area available for nutrient absorption. Enterocytes perform transcellular transport of amino acids, glucose, fatty acids, vitamins, and minerals across the intestinal wall into portal circulation. They are joined laterally by tight junction proteins including occludin, claudin, and ZO-1, which seal the paracellular space and prevent translocation of pathogens and endotoxins into the bloodstream. GLP-2, secreted by enteroendocrine L cells in response to luminal nutrients including glycine, upregulates tight junction protein expression in enterocytes via IGF-1 and PI3K/Akt/mTORC1 signalling, actively reinforcing barrier integrity. Enterocyte turnover is rapid (approximately 3 to 5 days), making the epithelial pool sensitive to nutritional adequacy.
Benefits
Intact enterocytes maximize nutrient absorption efficiency and prevent bacterial translocation and endotoxemia. Compromised enterocyte integrity, increased paracellular permeability (sometimes called leaky gut), is associated with systemic inflammation, impaired amino acid uptake, and reduced micronutrient bioavailability. Supporting tight junction expression via glycine and collagen peptides preserves absorptive surface area and uptake efficiency.
Risks/considerations
Rapid turnover creates a continuous demand for protein, zinc, and glutathione precursors including NAC. Note that butyrate is the primary fuel for colonocytes (large intestinal epithelial cells) rather than small intestinal enterocytes, though butyrate still supports tight junction integrity across both cell types.
Optimal dosing
N/A (cell type). Enterocyte health is supported by adequate protein, zinc, glutathione precursors, and glycine-containing sources such as collagen peptides.
Found in
N/A (cell type; constitutes the small intestinal epithelium).
References
  1. Darwich et al. 2014: meta-analysis (Drug Metab Dispos, 85 studies, n=1,602 subjects across 6 species); human enterocyte turnover weighted geometric mean = 3.48 ± 1.55 days; mice 2.81 days, rats 2.37 days; confirms the rapid 3 to 5 day renewal rate of the small intestinal epithelium. PMID 25233858 | DOI
  2. Ziegler et al. 2003: review (Annu Rev Nutr); zinc, glutamine, glutathione, glycine, and vitamin A identified as key nutrients supporting intestinal epithelial cell turnover, mucosal repair, adaptation, and barrier function; confirms the continuous nutritional demand created by rapid enterocyte renewal. PMID 12626687 | DOI
  3. Turner 2009: review (Nat Rev Immunol); defines intestinal mucosal epithelium as a selectively permeable barrier responsible for nutrient absorption alongside immune exclusion; details how tight junction regulation shapes mucosal immune responses, and how barrier dysfunction contributes to systemic disease; foundational reference establishing the link between epithelial permeability and extra-intestinal pathology. PMID 19855405 | DOI
  4. McCarty & Lerner 2021: review (Adv Nutr); glycine and glutamine promote GLP-2 secretion from intestinal L cells, which drives tight junction formation via PI3K/Akt/mTORC1 in enterocytes; confirms glycine as a nutraceutical supporting intestinal barrier function and absorption efficiency. PMID 33126251 | DOI
Related
Collagen Peptides · Glycine · Glutathione · NAC (N-Acetyl Cysteine) · Butyrate / Sodium Butyrate · Zinc · mTOR

Enzyme

Full name
Enzyme (biological catalyst)
Type
Biochemical class / catalytic protein
What it does
A protein (occasionally RNA) that catalyses a specific chemical reaction, dramatically accelerating it without being consumed in the process. Enzymes are named for their substrate and reaction type: kinases phosphorylate, dehydrogenases remove hydrogen, carboxylases add CO2, deacetylases remove acetyl groups. Each enzyme requires specific conditions (pH, temperature) and often a cofactor or coenzyme to function: this is why vitamin deficiencies cause such broad metabolic disruption. Enzyme activity can be enhanced (by substrate availability, activators, or optimal cofactor levels) or inhibited (by competitive inhibitors that block the active site, or allosteric inhibitors that change the enzyme's shape). Many protocol compounds work as enzyme inhibitors: apigenin inhibits CD38, butyrate inhibits HDACs, berberine inhibits mitochondrial complex I (via the same mechanism as metformin). Understanding enzyme kinetics clarifies why form and dose matter: a compound must reach the target enzyme at a concentration sufficient to produce meaningful inhibition.
Benefits
N/A (class). Enzyme literacy is foundational to understanding why supplements work, why cofactor sufficiency matters, and why enzyme inhibition is a valid longevity strategy.
Risks/considerations
Enzyme inhibition is always context-dependent: inhibiting CD38 to preserve NAD+ is beneficial; inhibiting cytochrome P450 enzymes (as some polyphenols do at high doses) can affect drug metabolism.
Optimal dosing
N/A (class). Individual enzyme-targeted compounds have specific dosing: see relevant entries.
Found in
N/A (produced endogenously in every cell; supplemental digestive enzymes from porcine or plant sources)
Related
Coenzyme · Carboxylase · HDAC · CD38 · Digestive Enzymes · Phase II Detoxification · Nrf2

Epigenetic

Full name
Epigenetic regulation (above the genome)
Type
Biochemical mechanism / gene expression control
What it does
Refers to heritable changes in gene expression that do not involve changes to the DNA sequence itself. Epigenetic modifications act on chromatin (the DNA-protein complex) to make genes more or less accessible to transcription. Three primary mechanisms: DNA methylation (methyl groups added to cytosine bases, typically silencing genes), histone modification (acetylation, methylation, phosphorylation of histone proteins: affecting chromatin compaction), and non-coding RNA regulation. The methylation cycle directly feeds DNA methylation via SAMe as the universal methyl donor. HDACs remove acetyl groups from histones, condensing chromatin and silencing gene expression; sirtuins are a class of HDACs that use NAD+ as a cofactor. Butyrate inhibits HDACs, promoting anti-inflammatory and anti-cancer gene expression. Longevity research increasingly treats epigenetic clocks (DNA methylation patterns) as biomarkers of biological age.
Benefits
Understanding epigenetic regulation clarifies why methylation support, NAD+ restoration, gut health, and dietary fibre have such broad effects on gene expression and biological aging: they are all feeding into epigenetic control mechanisms.
Risks/considerations
Epigenetic modifications are reversible but some persist across cell divisions and even generations. Methylation undersupply (MTHFR TT) can produce hypomethylation of gene promoters: a pattern associated with cancer risk and accelerated aging.
Optimal dosing
N/A (regulatory mechanism). Influenced by methylation cycle substrate sufficiency, NAD+ levels (via NMN), gut butyrate production, and autophagy activation.
Found in
N/A (regulatory mechanism operating in every cell)
Related
Methylation Cycle · SAMe · HDAC · Sirtuins · NAD+ · Butyrate · NMN

Flavonoid

Full name
Flavonoid (polyphenolic plant secondary metabolite)
Type
Polyphenol subclass / bioactive plant compound
What it does
A large class of polyphenolic compounds found in plants, characterised by a 15-carbon skeleton with two phenyl rings and one heterocyclic ring. Flavonoids are the largest subclass of polyphenols and include several protocol-relevant compounds: apigenin (a flavone, CD38 inhibitor and GABA-A modulator), fisetin (a flavonol, the most potent natural senolytic), and quercetin (a flavonol with senolytic and Nrf2-activating properties). Flavonoids generally share broad mechanisms: antioxidant activity, anti-inflammatory signalling via NF-kB inhibition, and enzyme modulation. Their specific targets and potencies vary significantly by subclass and individual compound. Bioavailability is highly variable and often poor without structural modification (glycoside vs. aglycone forms, lipid carriers, or metabolic activation by gut bacteria).
Benefits
Antioxidant protection, anti-inflammatory, senolytic activity (at pulse doses for the potent senolytics), NAD+ preservation (apigenin via CD38 inhibition), sleep support, neuroprotection.
Risks/considerations
Generally well tolerated at dietary and supplemental doses. Some flavonoids inhibit CYP450 enzymes and can affect drug metabolism at high doses. Bioavailability of most flavonoids is poor: form and delivery matter.
Optimal dosing
N/A (class). Dosing is compound-specific: see individual entries for Apigenin and Flavonoid | Fisetin.
Found in
Fruits, vegetables, tea, red wine, herbs. Widely distributed in the plant kingdom.
Related
Polyphenol · Apigenin · Fisetin · CD38 · Senolytic · Nrf2 · Antioxidant

Isoprenoid

Full name
Isoprenoid (terpenoid / isoprene-derived compound)
Type
Lipid class / biosynthetic compound class
What it does
A vast class of compounds derived from the five-carbon isoprene unit, biosynthesised via the mevalonate pathway. Isoprenoids include cholesterol, steroid hormones, fat-soluble vitamins (A, E, K), CoQ10, and geranylgeraniol (GG). The mevalonate pathway is the same pathway statins inhibit to lower cholesterol: which explains why statin use depletes CoQ10 and GG as collateral damage. GG (a 20-carbon isoprenoid) is a direct precursor to Vitamin K2 MK-4 (in tissues), CoQ10 (in mitochondria), and dolichol (protein glycosylation). CoQ10 (a 50-carbon isoprenoid) is both a mitochondrial electron carrier and a fat-soluble antioxidant. The tocotrienols in Eannatto are also isoprenoid-related, sharing the prenyl side chain structure.
Benefits
N/A (class). Understanding isoprenoid biosynthesis explains the downstream effects of statin use on CoQ10 and K2 MK-4, and the rationale for GG supplementation to replenish these depleted pools.
Risks/considerations
Statin-induced mevalonate pathway inhibition reduces synthesis of all downstream isoprenoids, not just cholesterol. Those on statins should supplement CoQ10 and consider GG to address the collateral depletion.
Optimal dosing
N/A (compound class). Supplemented via CoQ10 / Ubiquinol and Geranylgeraniol (GG).
Found in
N/A (synthesised endogenously via mevalonate pathway; dietary sources include animal fats and plant oils)
Related
CoQ10 / Ubiquinol · Geranylgeraniol (GG) · Vitamin K2 MK-4 · Eannatto / Tocotrienols · Vitamin A · Vitamin D3 · Cholesterol

Metabolic Process

Full name
Metabolic process (biochemical pathway or reaction)
Type
Biochemical concept
What it does
Any chemical reaction or series of reactions that occurs within a living organism to sustain life. Metabolic processes transform molecules: breaking them down (catabolism) or building them up (anabolism): and in doing so generate or consume energy, produce structural components, and create signalling molecules. They occur in specific subcellular locations (mitochondria, cytoplasm, endoplasmic reticulum, nucleus), require specific enzymes and cofactors, and are tightly regulated by cellular energy status, hormones, and nutrient availability. The distinction between a metabolic process and a pathway: a pathway is a defined sequence of reactions; a metabolic process is the broader category. AMPK and mTOR are the primary sensors that shift the balance between catabolic and anabolic metabolic processes in response to nutrient and energy status.
Benefits
N/A (foundational concept). Understanding metabolic processes clarifies why nutrient timing, fasting windows, and cofactor sufficiency produce such broad systemic effects: they regulate the rate and direction of hundreds of interdependent reactions simultaneously.
Risks/considerations
N/A
Optimal dosing
N/A
Found in
N/A (universal biological concept)
Related
Catabolism · AMPK · mTOR · TCA Cycle · Anaplerosis · Gluconeogenesis · Ketogenesis · Glycogen · Methylation Cycle

Metalloid

Full name
Metalloid (semimetal)
Type
Chemical classification
What it does
Elements with properties intermediate between metals and nonmetals. In toxicology and health contexts, the term is most relevant for arsenic: the primary metalloid of concern in human health. Metalloids can conduct electricity under some conditions but not others, and their biological behaviour is distinct from true heavy metals: arsenic, for example, primarily disrupts mitochondrial enzyme function and generates reactive oxygen species rather than displacing structural metal ions as lead and cadmium do. The distinction matters because chelation strategies and protective nutrients differ: arsenic responds to glutathione and R-ALA support, while lead responds more to calcium and zinc competition for binding sites.
Benefits
N/A (classification concept). Understanding the metalloid category clarifies why arsenic toxicity and protective strategies differ from those for true heavy metals.
Risks/considerations
N/A
Optimal dosing
N/A
Found in
N/A (chemical classification)
Related
Arsenic · Lead · Mercury · Cadmium · Chelation

Methyl Donor

Full name
Methyl donor (one-carbon metabolism substrate)
Type
Biochemical class / methylation substrate
What it does
A molecule that donates a methyl group (CH3) to another molecule via enzymatic transfer. Methyl donors are the currency of one-carbon metabolism: the methylation cycle that regulates gene expression (DNA and histone methylation), neurotransmitter synthesis and breakdown, phospholipid synthesis, and homocysteine clearance. SAMe (S-adenosylmethionine) is the universal methyl donor: the final common pathway through which all methylation reactions operate. SAMe is regenerated from methionine using methyl groups supplied by methylfolate and methylcobalamin (via the MTHFR enzyme), or by TMG (via the BHMT enzyme, MTHFR-independent). Key supplemental methyl donors: TMG, methylfolate, methylcobalamin, and choline.
Benefits
Adequate methyl donor supply supports: homocysteine clearance (cardiovascular protection), epigenetic gene regulation, neurotransmitter synthesis, phosphatidylcholine production, creatine and carnitine synthesis, and detoxification.
Risks/considerations
Over-methylation (excess methyl donor intake relative to demand) can cause anxiety, irritability, histamine reactions, and insomnia: most relevant when COMT activity is slow (COMT Val/Met or Met/Met). Fast COMT (GG variant) significantly reduces over-methylation risk at supplemental doses. Under-methylation from insufficient methyl donors impairs all the above processes.
Genetic qualifiers
MTHFR TT: 70-80% reduced enzyme activity shifts dependence from the methylfolate pathway to the TMG/BHMT pathway, which makes TMG an especially useful complement to methylfolate. COMT GG: fast catecholamine clearance reduces over-methylation risk at supplemental methyl donor doses.
Found in
TMG/betaine (beets, spinach), choline (eggs, liver), folate (leafy greens), B12 (meat, fish, dairy).
Related
Methylation Cycle · SAMe · TMG · Folate / Methylfolate · Methylcobalamin (B12) · Choline · Homocysteine · Transsulfuration Pathway

Neuromodulator

Full name
Neuromodulator (diffuse chemical signal modulator)
Type
Biochemical class / neurotransmitter-adjacent signalling molecule
What it does
A chemical that modulates the activity of neurons but differs from classical neurotransmitters in its mode of action. Where neurotransmitters act rapidly and locally at a synapse (milliseconds, point-to-point), neuromodulators act more slowly and diffusely: they are released into the extracellular space and modulate the responsiveness of many neurons simultaneously, effectively tuning the gain of entire neural circuits. Acetylcholine functions as both a neurotransmitter (fast, synaptic) and a neuromodulator (slow, diffuse) depending on the pathway: its modulatory role in cortical attention and arousal is distinct from its synaptic role at the neuromuscular junction. Other key neuromodulators: dopamine (reward, motivation, working memory), serotonin (mood, appetite, sleep), norepinephrine (alertness, stress response), adenosine (sleep pressure: caffeine works by blocking adenosine receptors). The methylation cycle governs neuromodulator breakdown via COMT (catecholamine-O-methyltransferase) and MAO enzymes.
Benefits
N/A (class). Understanding neuromodulation clarifies why compounds like L-Theanine (modulates GABA and glutamate tone broadly) and apigenin (GABA-A modulator) produce diffuse cognitive and sleep effects rather than targeted point-to-point signals.
Risks/considerations
N/A
Optimal dosing
N/A (class). Modulated by methylation cycle efficiency (COMT activity), P5P (synthesis cofactor), and specific compound interactions.
Found in
N/A (endogenous signalling class)
Related
Neurotransmitter · Acetylcholine · GABA-A Receptor · L-Theanine · Methylation Cycle · Pyridoxal-5-Phosphate (B6)

Neurotransmitter

Full name
Neurotransmitter (chemical messenger)
Type
Biochemical class / signalling molecule
What it does
A chemical messenger released by a neuron at a synapse to transmit a signal to a target cell (another neuron, a muscle cell, or a gland). Neurotransmitters bind to receptors on the target cell, producing either excitatory (increased firing probability) or inhibitory (decreased firing probability) effects. They are synthesised from dietary amino acid precursors and require specific B vitamin cofactors for their synthesis enzymes. Key neurotransmitters referenced in the glossary: acetylcholine (attention, memory, parasympathetic tone; synthesised from choline), GABA (primary inhibitory neurotransmitter; synthesised from glutamate using P5P), and the catecholamines dopamine and norepinephrine (motivation, focus; synthesised from tyrosine using P5P). The methylation cycle governs neurotransmitter breakdown via COMT (catecholamine-O-methyltransferase): COMT activity determines how quickly catecholamines are cleared after release.
Benefits
N/A (class of molecules). Ensuring adequate precursor supply (choline, B vitamins) supports neurotransmitter synthesis across multiple systems simultaneously.
Risks/considerations
Methylation cycle dysfunction (MTHFR TT) can impair neurotransmitter balance: both synthesis (via B vitamin insufficiency) and clearance (via impaired COMT substrate supply). Cholinergic excess (too much acetylcholine activity) from very high choline doses can cause GI cramping and bradycardia.
Genetic qualifiers
COMT GG: fast catecholamine clearance; dopamine and norepinephrine are broken down quickly, reducing overmethylation risk from methylation support.
Found in
N/A (produced endogenously from dietary precursors)
Related
Acetylcholine · GABA-A Receptor · Choline · Pyridoxal-5-Phosphate (B6) · Methylation Cycle · Methyl Donor

Nucleotide

Full name
Nucleotide (nucleoside monophosphate)
Type
Biochemical class / molecular building block
What it does
The fundamental building blocks of nucleic acids (DNA and RNA) and several critical coenzymes. A nucleotide consists of three components: a nitrogenous base (adenine, guanine, cytosine, thymine, or uracil), a five-carbon sugar (ribose in RNA, deoxyribose in DNA), and one to three phosphate groups. The number of phosphate groups determines function: monophosphates (AMP) are structural; diphosphates (ADP) are intermediates; triphosphates (ATP) are the energy currency of the cell. NAD+ and NMN are also nucleotide derivatives: NMN is a nucleotide monophosphate that is a direct NAD+ precursor. Understanding nucleotide structure clarifies why ATP hydrolysis releases energy (breaking the high-energy phosphate bond) and why AMP accumulation signals energy deficit to AMPK.
Benefits
N/A (structural class). Nucleotide literacy clarifies the ATP→ADP→AMP energy cascade, the AMPK activation mechanism, and the role of NMN as a NAD+ precursor.
Risks/considerations
N/A
Optimal dosing
N/A (structural class). Cellular nucleotide pools depend on adequate dietary purines, B vitamins, and folate for de novo synthesis.
Found in
N/A (produced endogenously; dietary nucleotides from meat, fish, legumes are absorbed and recycled)
Related
ATP · ADP · AMP · NAD+ · NMN · AMPK

Phospholipid

Full name
Phospholipid (glycerophospholipid)
Type
Lipid class / structural membrane component
What it does
A class of lipids that form the primary structural component of all cell membranes. A phospholipid molecule has a hydrophilic (water-attracting) head containing a phosphate group and a glycerol backbone, and two hydrophobic (water-repelling) fatty acid tails. In aqueous environments, phospholipids spontaneously arrange into bilayers with the hydrophilic heads facing outward and the fatty acid tails facing inward: the basic architecture of every cell membrane. Membrane fluidity and function depend on the fatty acid composition of the phospholipid tails: saturated fatty acids make membranes more rigid, polyunsaturated fatty acids more fluid. The balance matters: excess fluidity (depleted C15:0) increases susceptibility to ferroptosis. Phosphatidylcholine is the most abundant phospholipid in mammalian membranes. Choline is the primary dietary precursor for phospholipid head group synthesis.
Benefits
Membrane integrity, cellular signalling (phospholipid-derived second messengers), lipoprotein transport (HDL, VLDL structure), lung surfactant function.
Risks/considerations
Phospholipid composition is modifiable through diet and supplementation. Excessive polyunsaturated fatty acid content in membranes without adequate antioxidant protection increases ferroptosis risk.
Optimal dosing
N/A (structural molecule). Maintained via adequate choline intake, phospholipid-bound omega-3s (krill oil), and C15:0 for membrane rigidity support.
Found in
Eggs (yolk), liver, soy lecithin, sunflower lecithin, krill oil (phospholipid-bound omega-3s).
Related
Phosphatidylcholine · Choline · C15:0 · Ferroptosis · Krill Oil / Omega-3 · Methylation Cycle · HDL

Polyphenol

Full name
Polyphenol (plant-derived phenolic compound)
Type
Biochemical class / bioactive plant compound
What it does
A broad class of naturally occurring plant compounds characterised by multiple phenol rings. Polyphenols are produced by plants as defence mechanisms against UV radiation, pathogens, and oxidative stress: they are the plant's own antioxidant and signalling system. In humans, polyphenols produce beneficial effects via multiple mechanisms: direct antioxidant activity, enzyme modulation (CD38 inhibition, HDAC inhibition, Nrf2 activation, AMPK activation), receptor modulation (GABA-A, sirtuin activation), and gut microbiome modulation. Polyphenols are divided into major subclasses: flavonoids (largest group: includes apigenin, fisetin), stilbenes (resveratrol), phenolic acids, lignans, and tannins. Bioavailability varies enormously by compound, form (glycoside vs. aglycone), food matrix, and gut microbiome composition: a rich L. Reuteri microbiome enhances conversion of piceid to resveratrol.
Benefits
Broad-spectrum antioxidant protection, anti-inflammatory, longevity signalling (sirtuin activation, AMPK activation), cardiovascular protection, NAD+ preservation (CD38 inhibition), senolytic activity (at therapeutic doses for specific compounds).
Risks/considerations
Bioavailability is the primary challenge: many well-studied polyphenols have poor oral absorption in standard forms. Delivery innovations (piceid form for resveratrol, specific formulations for curcumin) address this. High-dose isolated polyphenols may inhibit CYP450 enzymes.
Optimal dosing
N/A (class). Dosing is compound-specific: see individual entries for Apigenin, Berberine, Curcumin, Fisetin, Resveratrol.
Found in
Widely distributed across fruits, vegetables, tea, coffee, red wine, spices, herbs.
Related
Flavonoid · Apigenin · Berberine · Curcumin · Fisetin · Resveratrol · Antioxidant · Nrf2 · Sirtuins · CD38 · L. Reuteri

Postbiotic

Full name
Postbiotic (microbial metabolite or component)
Type
Biochemical class / gut microbiome product
What it does
A postbiotic is a preparation of inanimate microorganisms or their components or metabolites that confers a health benefit on the host. The term was formalised by the International Scientific Association for Probiotics and Prebiotics (ISAPP) in 2021 to distinguish between live microorganisms (probiotics), substrates that feed them (prebiotics), and the bioactive compounds they produce or consist of. Protocol-relevant postbiotics: Urolithin A (produced by gut bacteria from ellagitannins; activates mitophagy) and butyrate (produced from dietary fibre fermentation; HDAC inhibitor, colonocyte fuel). Both are supplemented directly because gut microbiome production is unreliable or insufficient. The postbiotic category also includes C15:0 produced by gut bacteria from dietary inulin (Wei et al., Nature Microbiology 2023).
Benefits
Understanding the postbiotic category clarifies why direct supplementation of Urolithin A and butyrate is used: gut conversion from precursors is variable and often insufficient for therapeutic effect.
Risks/considerations
N/A (class concept).
Optimal dosing
N/A (class). See Urolithin A and Butyrate for compound-specific dosing.
Found in
Produced by gut bacteria from dietary substrates; commercial preparations available.
Related
Urolithin A · Butyrate · C15:0 · L. Reuteri · Mitophagy · HDAC

Reactive Oxygen Species

Full name
Reactive Oxygen Species (ROS) / Free Radicals
Type
Chemical class / oxidative stress mediator
What it does
Highly reactive molecules containing oxygen that have one or more unpaired electrons, making them chemically unstable and prone to reacting with cellular components. Primary ROS include superoxide (O2•−), hydrogen peroxide (H2O2), and the hydroxyl radical (•OH: the most destructive). ROS are generated as a byproduct of normal mitochondrial respiration (approximately 1-3% of oxygen consumed leaks as superoxide), as well as by immune cells (deliberate bactericidal burst), and by exposure to radiation, toxins, and heavy metals (lead, mercury, cadmium, arsenic). At low concentrations, ROS are beneficial signalling molecules that drive hormetic adaptations (the beneficial stress response to exercise that improves mitochondrial function). At chronically elevated concentrations, ROS cause oxidative damage to cell membranes (ferroptosis), proteins, and DNA: a mechanism central to aging. The body's primary ROS defence systems are antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase) and small-molecule antioxidants (glutathione, Vitamin C, CoQ10, R-ALA).
Benefits
At low (hormetic) doses: signalling for mitochondrial biogenesis, immune activation, and cellular adaptation. Understanding ROS biology clarifies why antioxidant support is foundational to longevity protocols, and why megadosing isolated antioxidants can blunt beneficial hormetic responses.
Risks/considerations
Chronic elevated ROS (from poor mitochondrial function, nutrient deficiency, environmental toxin exposure) drives cumulative oxidative damage. Selenium deficiency impairs glutathione peroxidase (the enzyme that neutralises lipid peroxides), making it a critical ROS defence cofactor.
Genetic qualifiers
GSTP1 GG: reduced Phase II glutathione conjugation capacity means reactive metabolites (including some ROS-damaged lipids) clear more slowly.
Found in
N/A (produced endogenously and by environmental exposure)
Related
Antioxidant · Glutathione · Ferroptosis · NAC · R-ALA · Selenium · CoQ10 · Nrf2 · Mitochondrial Biogenesis

Short-Chain Fatty Acid

Full name
Short-Chain Fatty Acid (SCFA)
Type
Lipid class / gut microbiome metabolite
What it does
Fatty acids with fewer than six carbon atoms, produced primarily by gut bacteria through fermentation of dietary fibre and resistant starch. The three primary SCFAs are acetate (2C), propionate (3C), and butyrate (4C). Butyrate is the most protocol-relevant: it is the primary fuel source for colonocytes, an HDAC inhibitor, a gut barrier integrity supporter, and an anti-inflammatory and anti-cancer signalling molecule. Propionate is converted to glucose in the liver (gluconeogenic precursor) and has appetite-regulating effects. Acetate circulates systemically and can cross the blood-brain barrier. SCFA production depends entirely on the composition of the gut microbiome and the availability of fermentable substrate: a low-fibre diet starves SCFA-producing bacteria. L. Reuteri and other probiotic species support the gut environment in which SCFA producers thrive. Direct supplementation of butyrate (sodium butyrate) bypasses the variable fermentation step and delivers the active compound directly.
Benefits
Gut barrier integrity, epigenetic regulation via HDAC inhibition, anti-inflammatory gene expression, colon cancer risk reduction, metabolic benefits (appetite regulation, glucose metabolism), immune modulation.
Risks/considerations
Supplemental SCFA delivery (sodium butyrate) has a characteristic odour. Enteric-coated or butyrate salt forms preferred to get past the stomach.
Optimal dosing
N/A (class). See Butyrate / Sodium Butyrate for compound-specific dosing.
Found in
Produced by gut bacteria from dietary fibre (oats, legumes, vegetables, resistant starch); small amounts in butter and ghee.
Related
Butyrate / Sodium Butyrate · L. Reuteri · HDAC · Epigenetic · Ghee · Postbiotic

Transcription Factor

Full name
Transcription factor (gene expression regulator)
Type
Regulatory protein / gene expression mechanism
What it does
A protein that binds to specific DNA sequences (promoter or enhancer regions) and controls whether a gene is transcribed into messenger RNA (and therefore whether its protein is produced). Transcription factors are the primary mechanism by which cells respond to internal and external signals: when a signalling molecule activates a transcription factor, it can simultaneously switch on or off dozens of genes. Two transcription factors are central to longevity supplement mechanisms: Nrf2 (activates the antioxidant and Phase II detoxification gene battery in response to oxidative stress; activated by berberine, curcumin, R-ALA, silymarin, and fasting) and NF-kB (master pro-inflammatory transcription factor; inhibited by many of the same polyphenols that activate Nrf2). The balance between Nrf2 (cytoprotective) and NF-kB (inflammatory) activity is a key target of anti-aging interventions.
Benefits
N/A (regulatory mechanism). Interventions that shift the Nrf2/NF-kB balance toward Nrf2 activation produce broad anti-inflammatory and cytoprotective gene expression changes with a single compound.
Risks/considerations
Transcription factor modulation is inherently pleiotropic: activating Nrf2 affects hundreds of downstream genes simultaneously. This is a strength in the context of antioxidant and detoxification support, but means effects are broad rather than targeted.
Optimal dosing
N/A (regulatory mechanism). Influenced by Nrf2 activators including berberine, curcumin, R-ALA, and fasting.
Found in
N/A (endogenous regulatory proteins)
Related
Nrf2 · Phase II Detoxification · Glutathione · Polyphenol · Berberine · Curcumin · Epigenetic

The BioForge Glossary · 8 entries

Biomarkers and Concepts

Tracking metrics, lifestyle patterns, and systemic concepts.

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Circadian Rhythm

Full name
Circadian Rhythm (24-hour biological clock)
Type
Biological mechanism / master timing system
What it does
The endogenous ~24-hour cycle governing sleep-wake, hormone release, core body temperature, immune function, and metabolism. Driven by the suprachiasmatic nucleus (SCN) in the hypothalamus, entrained by light and feeding timing.
Benefits
Alignment with circadian rhythm optimises all downstream biological functions. Disruption (shift work, irregular meals) degrades HRV, immune function, metabolic health, and cognitive performance.
Risks/considerations
Shift work produces chronic circadian disruption: managing fasting windows, meal timing, and light exposure relative to shift schedule is essential. MTNR1A A allele increases light and geomagnetic sensitivity via the pineal pathway, amplifying circadian disruption from irregular schedules.
Optimal dosing
Endogenous. Entrainment via consistent sleep/wake timing, morning light exposure, meal timing, and minimising blue light at night.
Genetic qualifiers
MTNR1A rs12506228 A allele: heightened sensitivity to light and geomagnetic events via pineal melatonin pathway.
Found in
N/A (endogenous system)
Related
HRV · Magnesium · Apigenin

HRV (Heart Rate Variability)

Full name
Heart Rate Variability
Type
Physiological metric / autonomic nervous system readout
What it does
Measures the millisecond variation between successive heartbeats. Higher HRV indicates greater autonomic flexibility and parasympathetic dominance (recovery, restoration). Lower HRV indicates sympathetic dominance (stress, inflammation, recovery debt). Most wearables report it as rMSSD (the root mean square of successive differences between beats).
Benefits
Primary proxy for systemic health, recovery status, and stress load. The most sensitive single metric for tracking the impact of lifestyle and supplementation interventions.
Risks/considerations
Wearable HRV platforms use population norms; personal baseline is the relevant reference frame, not population averages. Recovery scores derived from HRV should be interpreted relative to your own trend, not absolute numbers. Read as a witness signal, not an optimisation target.
Optimal dosing
N/A (metric, not supplement). Optimised by: sleep quality, consistent sleep timing, nutrition, fasting, stress management, and vagal tone practices.
Genetic qualifiers
MTNR1A rs12506228 A allele: a possible link to heightened light and geomagnetic sensitivity via the melatonin pathway, which could acutely lower HRV on nights of strong geomagnetic activity (Kp 4 and above); not established in research, so such nights are best read as outliers rather than trend.
Found in
N/A
Related
Magnesium · Methylation Cycle · CoQ10 · Circadian Rhythm

Hypothalamus

Full name
Hypothalamus
Type
Brain region / neuroendocrine control centre
What it does
A small but critical brain region that serves as the master regulator of homeostasis: coordinating the endocrine system, autonomic nervous system, and circadian timing. Contains the suprachiasmatic nucleus (SCN), the primary circadian clock that synchronises biological rhythms to the light-dark cycle. Regulates body temperature, hunger and satiety (via leptin and ghrelin signalling), thirst, sleep-wake cycles, stress response (via HPA axis), and reproductive function. Directly interfaces with the pituitary gland to control most hormonal cascades.
Benefits
N/A (brain region). Understanding hypothalamic function clarifies why sleep timing, meal timing, and light exposure have such broad metabolic effects: they all feed into hypothalamic regulatory circuits.
Risks/considerations
Hypothalamic dysfunction (from chronic stress, obesity, or disrupted circadian signals) impairs the regulation of appetite, metabolism, and sleep simultaneously: explaining why lifestyle factors compound rather than act independently.
Optimal dosing
N/A (brain region). Optimised by consistent circadian entrainment: regular sleep/wake timing, morning light exposure, meal timing aligned with activity cycle, and limiting light exposure at night.
Found in
N/A (brain structure)
Related
Circadian Rhythm · HRV

Cholesterol

Full name
Cholesterol (Total Cholesterol)
Type
Cardiovascular biomarker / structural lipid
What it does
Essential structural lipid and the primary sterol in human cell membranes, where it regulates membrane fluidity and integrity. Also serves as the precursor to steroid hormones (cortisol, testosterone, oestrogen), bile acids, and fat-soluble vitamins including vitamin D. Synthesised endogenously via the mevalonate pathway primarily in the liver; also absorbed from animal-derived foods. Circulates packaged in lipoproteins: LDL carries cholesterol to peripheral tissues; HDL returns it to the liver. Total cholesterol on a standard lipid panel reflects the combined cholesterol content of all lipoprotein fractions (LDL + HDL + VLDL).
Benefits
Essential for cell membrane integrity, steroid hormone synthesis, bile acid production, and vitamin D metabolism. Dietary cholesterol has limited impact on serum cholesterol in most individuals due to compensatory regulation of endogenous synthesis.
Risks/considerations
Elevated total cholesterol correlates with cardiovascular risk, but predictive value is primarily driven by the LDL fraction and modified by HDL. Total cholesterol alone has poor discriminatory value; fractionation is required for meaningful risk assessment. Statins reduce cholesterol by inhibiting the mevalonate pathway, with CoQ10 and geranylgeraniol (GG) depletion as a consequence.
Optimal dosing
N/A (biomarker). Standard clinical target: total cholesterol <200 mg/dL (borderline 200-239 mg/dL; high ≥240 mg/dL). Interpret only in context of full lipid fractionation; isolated total cholesterol is insufficient for cardiovascular risk stratification.
Genetic qualifiers
APOE ε4 (one or two copies): significantly elevated LDL-C response to dietary saturated fat, reduced hepatic LDL receptor clearance efficiency, and substantially higher cardiovascular risk compared to ε3/ε3. Stricter lipid targets and dietary fat quality carry greater importance. APOE ε2: tends toward lower LDL-C but elevated triglycerides; standard targets apply.
Found in
Synthesised endogenously via the mevalonate pathway; obtained from animal-derived foods including eggs, dairy, and meat.
Related
LDL · HDL · Triglycerides · Isoprenoid · Berberine · C15:0 · Eannatto / Tocotrienols

HDL (High-Density Lipoprotein)

Full name
High-Density Lipoprotein
Type
Cardiovascular biomarker / reverse cholesterol transport lipoprotein
What it does
Lipoprotein particle responsible for reverse cholesterol transport: removes excess cholesterol from peripheral tissues and arterial walls and returns it to the liver for recycling or excretion. The structural shell of HDL particles consists of phospholipids and phosphatidylcholine, enabling cholesterol uptake from tissues. HDL-C (HDL cholesterol content) is the standard measure on a lipid panel; HDL particle number and functionality are not captured by routine testing. HDL-C is inversely associated with cardiovascular disease risk across diverse populations.
Benefits
Each 1 mg/dL increment in HDL-C is associated with approximately 2% reduction in coronary heart disease risk in men and 3% in women, consistent across four major prospective cohort studies.1 Modifiable factors that raise HDL-C include sustained aerobic exercise, omega-3 fatty acid supplementation, weight loss, and smoking cessation.
Risks/considerations
Low HDL-C (<40 mg/dL in men, <50 mg/dL in women) is an independent cardiovascular risk factor. Pharmacological attempts to raise HDL-C (niacin, CETP inhibitors) have not consistently reduced cardiovascular events in RCTs, suggesting HDL functionality rather than concentration is the operative variable.
Optimal dosing
N/A (biomarker). Target: >40 mg/dL (men), >50 mg/dL (women); higher is generally better within physiological range. Assess alongside triglycerides via TG/HDL ratio (<2 target) as a metabolic health signal.
Found in
N/A (endogenous lipoprotein).
Related
Cholesterol · LDL · Triglycerides · Krill Oil / Omega-3 · Phospholipid · Phosphatidylcholine · Homocysteine · TMAO · C15:0
References
  1. Gordon DJ, Probstfield JL, Garrison RJ, et al. High-density lipoprotein cholesterol and cardiovascular disease. Four prospective American studies. Circulation. 1989;79(1):8-15. PMID 2642759 (pooled analysis of FHS, LRCF, CPPT, and MRFIT; 1 mg/dL increment in HDL-C associated with 2% CHD risk reduction in men and 3% in women; consistent inverse relation across all four studies)

LDL (Low-Density Lipoprotein)

Full name
Low-Density Lipoprotein
Type
Cardiovascular biomarker / atherogenic lipoprotein
What it does
Lipoprotein particle that transports cholesterol from the liver to peripheral tissues. The standard lipid panel measures LDL-C (cholesterol content of LDL particles). LDL-P (particle number, measured via NMR lipoprotein fractionation) is a stronger predictor of cardiovascular events than LDL-C alone: when LDL-P and LDL-C diverge, LDL-P better predicts future cardiovascular disease. Small dense LDL particles are more atherogenic than large buoyant particles due to greater arterial wall penetrance and susceptibility to oxidation.1
Benefits
N/A (transport vehicle; elevated levels are adverse). LDL-C reduction is one of the most robustly evidenced cardiovascular interventions in medicine.
Risks/considerations
Elevated LDL-C is associated with increased cardiovascular events: each 1.0 mmol/L reduction in LDL-C reduces major vascular events by approximately 22%, consistent across 26 RCTs and 170,000 participants.2 TMG at doses ≥4,000 mg/day raises LDL-C approximately 10 mg/dL and total cholesterol approximately 14 mg/dL; lipid monitoring is warranted above 4g/day.
Optimal dosing
N/A (biomarker). Targets: LDL-C <100 mg/dL (general population), <70 mg/dL (high cardiovascular risk); LDL-P via NMR fractionation for more precise risk stratification; small dense LDL-P is the higher-risk fraction when LDL-C and LDL-P diverge.
Genetic qualifiers
APOE ε4: reduced hepatic LDL receptor clearance efficiency results in persistently elevated LDL-C, especially in response to dietary saturated fat. APOE ε4 carriers should prioritise NMR fractionation to assess LDL-P and consider more aggressive targets (<70 mg/dL rather than <100 mg/dL).
Found in
N/A (endogenous lipoprotein).
Related
Cholesterol · HDL · Triglycerides · TMG · Betaine HCl · Berberine · C15:0 · Homocysteine · TMAO · Eannatto / Tocotrienols
References
  1. Cromwell WC, Otvos JD, Keyes MJ, et al. LDL Particle Number and Risk of Future Cardiovascular Disease in the Framingham Offspring Study. J Clin Lipidol. 2007;1(6):583-592. PMID 19657464 | PMC Full Text (prospective cohort, Framingham Offspring; LDL-P more strongly predicted future CVD than LDL-C; discordance common, LDL-P superior when they diverge; small dense LDL-P more atherogenic than large buoyant LDL)
  2. Cholesterol Treatment Trialists' (CTT) Collaboration. Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 participants in 26 randomised trials. Lancet. 2010;376(9753):1670-81. PMID 21067804 | PMC Full Text (meta-analysis, 26 RCTs, n=170,000; each 1.0 mmol/L LDL-C reduction reduces major vascular events by approximately 22%; consistent benefit across all risk subgroups)

Triglycerides

Full name
Triglycerides (Triacylglycerols)
Type
Cardiovascular biomarker / fat storage and transport molecule
What it does
The primary fat storage molecule in adipose tissue and the main form in which dietary fat circulates in the blood. Synthesised in the liver from excess dietary carbohydrates and fat, then packaged into VLDL particles for distribution to peripheral tissues. Elevated fasting triglycerides signal metabolic dysfunction, insulin resistance, and cardiovascular risk. The triglyceride-to-HDL ratio is a robust predictor of cardiovascular risk and a proxy for small dense LDL particle burden and insulin resistance.
Benefits
Essential energy storage; adipose triglycerides serve as the primary fuel reserve during fasting and prolonged exercise.
Risks/considerations
Elevated fasting triglycerides are associated with metabolic syndrome, insulin resistance, and cardiovascular risk. TG/HDL ratio highest versus lowest quartile carries a relative risk of 16.0 for myocardial infarction.1 Omega-3 fatty acids reduce fasting triglycerides by 15-30% at therapeutic doses (≥2g/day EPA+DHA).
Optimal dosing
N/A (biomarker). Targets: fasting triglycerides <150 mg/dL (borderline 150-199 mg/dL; high 200-499 mg/dL; very high ≥500 mg/dL); TG/HDL ratio <2 as metabolic health signal; ratio >3.5 associated with insulin resistance and elevated small dense LDL-P burden.
Genetic qualifiers
TCF7L2 TT: associated with elevated triglyceride levels and metabolic syndrome risk; Mediterranean dietary pattern is directly protective.
Found in
N/A (synthesised endogenously from excess dietary carbohydrate and fat).
Related
Cholesterol · LDL · HDL · Krill Oil / Omega-3 · Homocysteine · TMAO · C15:0
References
  1. Gaziano JM, Hennekens CH, O'Donnell CJ, Breslow JL, Buring JE. Fasting triglycerides, high-density lipoprotein, and risk of myocardial infarction. Circulation. 1997;96(8):2520-2525. PMID 9355888 (case-control, n=680; TG/HDL ratio highest vs lowest quartile: RR 16.0 for MI, 95% CI 7.7-33.1; ratio a stronger predictor than fasting TG alone)

OMAD (One Meal A Day)

Full name
One Meal A Day (OMAD)
Type
Fasting protocol / dietary pattern
What it does
An extreme time-restricted eating protocol in which all daily calories are consumed within a single meal, typically lasting 1-2 hours, with a 22-23 hour daily fasting window. Activates AMPK and suppresses mTOR during the fasting window, promoting fat oxidation, autophagy, and metabolic flexibility. The single feeding window then triggers a strong mTOR anabolic response for protein synthesis and repair. This feed-fast oscillation is the mechanism behind many of OMAD's longevity and body composition benefits. OMAD also provides significant insulin sensitization and an extended pre-sleep fasting window that directly supports HRV and sleep quality.
Benefits
Autophagy induction, fat oxidation, insulin sensitization, AMPK activation, metabolic flexibility, body composition, HRV and sleep quality via pre-sleep fasting window. Circadian alignment when meal timing is consistent.
Risks/considerations
Concentrated single-meal protein and fat load stresses digestive capacity: digestive enzymes are essential. Electrolyte intake requires deliberate management (sodium, potassium, magnesium) as processed food sodium is eliminated. Not appropriate without prior metabolic adaptation; transition gradually (16:8 → 20:4 → OMAD) to develop metabolic flexibility.
Optimal dosing
N/A (dietary pattern). Pre-sleep fasting window is the primary sleep quality lever: minimum 4 hours between last meal and sleep, ideally 6-8 hours.
Genetic qualifiers
TCF7L2 TT: OMAD provides strong daily insulin sensitization, directly addressing 2x T2D risk.
Found in
N/A (dietary protocol)
Related
AMPK · mTOR · Autophagy · HRV · Circadian Rhythm · Digestive Enzymes

The BioForge Glossary · 4 entries

Environmental Toxins

Heavy metals and metalloids with protocol-relevant toxicity mechanisms.

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Arsenic

Full name
Arsenic (As): inorganic and organic forms
Type
Environmental toxin / metalloid
What it does
A naturally occurring metalloid that is acutely toxic at high doses and chronically harmful at low-level exposure. Inorganic arsenic (arsenite and arsenate) is the most toxic form. It inhibits key mitochondrial enzymes (pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase), generating reactive oxygen species and depleting glutathione. Also disrupts Phase II detoxification capacity and is a confirmed human carcinogen (Group 1, IARC). Primary exposure routes: contaminated drinking water, rice and rice-based products, some seafood (organic arsenobetaine, generally less toxic). Chelation with R-ALA and NAC supports clearance by binding arsenic and supporting glutathione substrate availability.
Benefits
N/A (toxin). Understanding arsenic exposure informs the rationale for NAC, R-ALA, and antioxidant support in a longevity stack.
Risks/considerations
Low-level chronic exposure is widespread and largely invisible. Impaired Phase II conjugation (GSTP1 GG variant) increases vulnerability to reactive arsenic metabolites. Testing (urine arsenic speciation) is the only way to confirm exposure status.
Optimal dosing
N/A (minimise exposure). Supported by adequate glutathione substrate (NAC), R-ALA, and Phase II inducers.
Found in
Contaminated groundwater, rice, some seafood, wood preservatives (legacy).
Related
Chelation · Lead · Mercury · Cadmium · R-ALA · NAC · Glutathione · Phase II Detoxification
References
  1. Jomova K, Jenisova Z, Feszterova M, et al. Arsenic: toxicity, oxidative stress and human disease. Journal of Applied Toxicology. 2011;31(2):95-107. PMID 21321970 (abstract only)
  2. Jomova K, Alomar SY, Nepovimova E, et al. Heavy metals: toxicity and human health effects. Archives of Toxicology. 2024;99(1):153-209. PMID 39567405 | PMC Full Text (comprehensive review covering As, Cd, Pb, Hg mechanisms and chelation)

Cadmium

Full name
Cadmium (Cd)
Type
Environmental toxin / heavy metal
What it does
A non-essential heavy metal that accumulates preferentially in the kidneys and liver, with a biological half-life of 10-30 years: making chronic low-level exposure particularly harmful. Cadmium displaces zinc from zinc-dependent enzymes (including antioxidant enzymes), disrupts glutathione systems, and causes oxidative stress, tubular kidney damage, and bone demineralisation (Itai-itai disease at severe exposures). Also classified as a human carcinogen (Group 1, IARC). Primary exposure routes: cigarette smoke (highest single source), contaminated food (shellfish, organ meats, leafy vegetables grown in contaminated soil), and some occupational exposures. Chelation with NAC and glutathione precursors supports clearance and reduces oxidative burden from accumulated cadmium.
Benefits
N/A (toxin). Understanding cadmium toxicity clarifies the importance of zinc:cadmium balance, glutathione support, and kidney health monitoring.
Risks/considerations
Non-smokers accumulate cadmium primarily through diet. Impaired Phase II capacity (GSTP1 GG variant) increases oxidative vulnerability. Urine cadmium is the standard biomarker for chronic exposure.
Optimal dosing
N/A (minimise exposure). Supported by NAC, zinc (competes for absorption), and Phase II inducers.
Genetic qualifiers
GSTP1 GG: reduced glutathione conjugation capacity amplifies cadmium-induced oxidative burden.
Found in
Cigarette smoke, shellfish, organ meats, leafy greens from contaminated soil, some phosphate fertilizers.
Related
Chelation · Lead · Mercury · Arsenic · NAC · Zinc · Glutathione · Phase II Detoxification
References
  1. Jomova K, Alomar SY, Nepovimova E, et al. Heavy metals: toxicity and human health effects. Archives of Toxicology. 2024;99(1):153-209. PMID 39567405 | PMC Full Text

Lead

Full name
Lead (Pb)
Type
Environmental toxin / heavy metal
What it does
A cumulative neurotoxin with no known safe level of exposure. Lead disrupts biological systems by mimicking calcium and zinc, incorporating into bone (where it stores for decades and re-mobilises during bone resorption), inhibiting heme synthesis (causing anemia), impairing neurotransmitter systems, and generating oxidative stress. In the brain, lead disrupts glutamatergic signalling and myelin integrity. Depletes glutathione and impairs Phase II detoxification enzymes. Historical exposure (legacy paint, leaded fuel) means many adults carry a body burden from childhood that is not reflected in blood lead levels. Chelation agents including R-ALA and NAC support mobilisation and excretion.
Benefits
N/A (toxin). Understanding lead toxicity explains the protective rationale for glutathione support, calcium and zinc adequacy, and bone health protocols.
Risks/considerations
Bone-stored lead re-enters circulation during periods of rapid bone resorption (menopause, extended fasting, caloric restriction). Blood lead level is not a reliable indicator of total body burden. Impaired Phase II capacity (GSTP1 GG variant) extends the window during which reactive lead metabolites circulate.
Optimal dosing
N/A (minimise exposure). Supported by adequate calcium, zinc, NAC, and R-ALA.
Found in
Legacy paint (pre-1978 buildings), old plumbing, contaminated soil, some ceramics and imported goods.
Related
Chelation · Mercury · Cadmium · Arsenic · R-ALA · NAC · Glutathione · Cadmium · Calcium · Zinc · Phase II Detoxification
References
  1. Jomova K, Alomar SY, Nepovimova E, et al. Heavy metals: toxicity and human health effects. Archives of Toxicology. 2024;99(1):153-209. PMID 39567405 | PMC Full Text

Mercury

Full name
Mercury (Hg): inorganic, elemental, and methylmercury forms
Type
Environmental toxin / heavy metal
What it does
A potent neurotoxin that exists in three forms: elemental mercury (vapour from dental amalgam, industrial), inorganic mercury salts, and methylmercury (the most bioavailable and neurotoxic form, accumulated in fish). Mercury binds sulfhydryl (-SH) groups on proteins and enzymes with high affinity, directly inactivating glutathione and disrupting Phase II detoxification. It inhibits antioxidant enzymes (including selenium-dependent glutathione peroxidase, GPx4), crosses the blood-brain barrier, and accumulates in neural tissue. Chelation by R-ALA and NAC proceeds via the same sulfhydryl binding affinity: the chelating agent out-competes enzymes for mercury binding and routes it to urinary excretion.
Benefits
N/A (toxin). Understanding mercury toxicity explains the synergistic protective value of selenium, NAC, and R-ALA in a longevity stack. Selenium directly antagonises mercury by forming an insoluble Hg-Se complex that sequesters mercury in tissues, protecting enzymatic selenoproteins.
Risks/considerations
Large predatory fish (tuna, swordfish, shark, king mackerel) accumulate high methylmercury through the food chain. GSTP1 GG variant reduces Phase II conjugation of mercury metabolites. Hair mercury testing reflects recent methylmercury exposure; urine mercury reflects inorganic and elemental exposure.
Optimal dosing
N/A (minimise exposure). Supported by adequate selenium, NAC, and R-ALA.
Genetic qualifiers
GSTP1 GG: impaired Phase II glutathione conjugation increases circulating time of reactive mercury metabolites.
Found in
Large predatory fish, dental amalgam, some vaccines (thiomersal, largely removed), industrial processes.
Related
Chelation · Lead · Cadmium · Arsenic · R-ALA · NAC · Selenium · Glutathione · Phase II Detoxification
References
  1. Jomova K, Alomar SY, Nepovimova E, et al. Heavy metals: toxicity and human health effects. Archives of Toxicology. 2024;99(1):153-209. PMID 39567405 | PMC Full Text

The BioForge Glossary · 26 entries

Mechanisms and Pathways

Biological processes, enzymatic pathways, and cellular mechanisms the stack targets and supports.

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AMPK

Full name
Adenosine Monophosphate-activated Protein Kinase
Type
Cellular energy sensor / metabolic pathway
What it does
Acts as a master metabolic switch that detects low cellular energy (high AMP:ATP ratio) and activates fat burning, mitochondrial biogenesis, and autophagy while suppressing anabolic processes that consume energy.1 Activated by fasting, exercise, and certain compounds.
Benefits
Fat oxidation, insulin sensitization, mitochondrial quality control, anti-aging via autophagy induction.2 Central to the metabolic benefits of Nucleotide | OMAD and extended fasting.
Risks/considerations
Chronic over-activation may suppress muscle protein synthesis (mTOR antagonism).4 Sequencing matters: AMPK (fasting/catabolism) and mTOR (feeding/anabolism) are balanced by OMAD timing.
Optimal dosing
Endogenous pathway. Activated by fasting (most potent), exercise, R-ALA,3 berberine,3 and metformin.3
Found in
N/A (endogenous pathway)
Related
ADP · AMP · ATP · Autophagy · Catabolism · mTOR · Mitochondrial Biogenesis · Berberine · Metabolic Process · Mercury · Metformin · R-ALA · OMAD
References
  1. Shirwany NA, Zou MH. AMPK in cardiovascular health and disease. Acta Pharmacologica Sinica. 2010. PMID 20711221 | PMC Full Text
  2. Tero-Vescan A, et al. Exercise-Induced Muscle-Fat Crosstalk: Molecular Mediators and Their Pharmacological Modulation for the Maintenance of Metabolic Flexibility in Aging. Pharmaceuticals. 2025. PMID 40872612 | PMC Full Text
  3. Tian X, et al. Berberine: A Negentropic Modulator for Multi-System Coordination. International Journal of Molecular Sciences. 2026. PMID 41596399 | PMC Full Text | Dong K, et al. α-Lipoic Acid Alleviates NAFLD via AMPK-TFEB Axis. Nutrients. 2026. PMID 41683226 | PMC Full Text (mechanistic study; R-ALA AMPK activation not yet confirmed in a clinical review)
  4. Chang J, et al. Molecular and Cellular Mechanisms Linking Chronic Kidney Disease and Sarcopenia in Aging. Clinical Interventions in Aging. 2025. PMID 40226833 | PMC Full Text

Anaplerosis

Full name
Anaplerosis (TCA cycle replenishment)
Type
Metabolic process / TCA cycle maintenance
What it does
The set of reactions that replenish intermediates of the TCA (Krebs) cycle when they are depleted by biosynthetic demands.1 The TCA cycle is not only an energy pathway: its intermediates are constantly drawn off as precursors for amino acid synthesis, fatty acid synthesis, gluconeogenesis, and other anabolic processes. Anaplerosis restores these intermediates to keep the cycle running. Key anaplerotic reactions include: pyruvate carboxylase (pyruvate → oxaloacetate; requires Biomarker | Biotin),2 glutamine/glutamate → alpha-ketoglutarate, and propionyl-CoA → succinyl-CoA. Without anaplerosis, the TCA cycle would stall as intermediates are diverted.
Benefits
Maintains ATP production, enables biosynthesis from TCA intermediates, supports amino acid and fatty acid metabolism. Critical for metabolic flexibility during fasting.
Risks/considerations
N/A
Optimal dosing
N/A (endogenous process). Depends on adequate Biotin for pyruvate carboxylase.
Found in
N/A (mitochondrial process)
Related
TCA Cycle · Carboxylase · Biotin · ATP · Catabolism
References
  1. Gibala MJ, Young ME, Taegtmeyer H. Anaplerosis of the citric acid cycle: role in energy metabolism of heart and skeletal muscle. Acta Physiologica Scandinavica. 2000;168(4):657-65. PMID 10759602 (abstract only)
  2. Marin-Valencia I, Roe CR, Pascual JM. Pyruvate carboxylase deficiency: mechanisms, mimics and anaplerosis. Molecular Genetics and Metabolism. 2010;101(1):9-17. PMID 20598931 (abstract only)

Autophagy

Full name
Autophagy (Greek: self-eating)
Type
Cellular recycling mechanism
What it does
The process by which cells break down and recycle damaged proteins, organelles, and cellular debris. Activated by fasting (AMPK), caloric restriction, and rapamycin.1 Mitophagy is the selective autophagy of damaged mitochondria.
Benefits
Cellular quality control, removal of senescent proteins, cancer risk reduction, longevity.1 Extended fasts push significantly deeper autophagy induction than daily fasting windows alone (note: direct human evidence for the 48-80 hour window is limited; this is supported by animal and mechanistic data).
Risks/considerations
Suppressed by feeding (mTOR activation). OMAD timing maximises the daily autophagy window. Extended fasts push deeper mitophagy.
Optimal dosing
Endogenous. Activated by 16+ hour fasts; deeper induction at 24-72 hours.
Found in
N/A (endogenous process)
Related
AMPK · mTOR · Mitophagy · Rapamycin · Mitochondrial Biogenesis · Urolithin A · OMAD
References
  1. Koutouroushis C, Sarkar O. Role of Autophagy in Cardiovascular Disease and Aging. Cureus. 2021;13(11):e20042. PMID 34873555 | PMC Full Text

Carboxylase

Full name
Carboxylase (enzyme class)
Type
Enzyme class / metabolic catalyst
What it does
A class of enzymes that catalyse carboxylation reactions: the addition of a CO2 molecule to a substrate. All carboxylases require Biotin as a coenzyme, making biotin essential for this entire enzyme class.1 Key carboxylases in human metabolism include: pyruvate carboxylase (gluconeogenesis, anaplerosis), acetyl-CoA carboxylase (fatty acid synthesis), propionyl-CoA carboxylase (odd-chain fatty acid and amino acid metabolism), and 3-methylcrotonyl-CoA carboxylase (leucine catabolism). Biotin deficiency impairs all four simultaneously.1
Benefits
N/A (enzyme class). Supporting carboxylase function is the primary metabolic rationale for Biotin supplementation.
Risks/considerations
Alpha-lipoic acid (R-ALA) competes with Biotin for the same membrane transporter, potentially impairing carboxylase cofactor availability. Choose an R-ALA formulation that includes Biotin, or supplement Biotin separately, to prevent this transporter competition.
Optimal dosing
Endogenous enzyme class. Dependent on adequate Biotin availability.
Found in
N/A (enzyme class; expressed in mitochondria and cytoplasm)
Related
Biotin · Gluconeogenesis · Anaplerosis · R-ALA
References
  1. Tong L. Structure and function of biotin-dependent carboxylases. Cellular and Molecular Life Sciences. 2013;70(5):863-91. PMID 22869039 | PMC Full Text

Catabolism

Full name
Catabolism (catabolic metabolism)
Type
Metabolic process
What it does
The breakdown phase of metabolism: the set of reactions that degrade complex molecules into simpler ones, releasing energy. Contrasts with anabolism (building). During the fasting window, catabolism dominates: AMPK is activated, fat stores are oxidised for fuel, glycogen is depleted, and cellular recycling (Autophagy, Mitophagy) is upregulated.1 During the feeding window, anabolism dominates: mTOR is activated, protein synthesis occurs, glycogen is replenished.2 OMAD creates a deliberate oscillation between these two states.
Benefits
Fat oxidation, cellular quality control via autophagy and mitophagy, insulin sensitivity, metabolic flexibility. The catabolic fasting window is where much of the longevity benefit of extended fasting occurs.
Risks/considerations
Excessive or chronic catabolism without adequate protein intake can cause muscle wasting. OMAD provides the anabolic stimulus needed to offset catabolic muscle breakdown via a concentrated protein meal and strong mTOR activation.2
Optimal dosing
Endogenous process. Managed via OMAD timing and fasting duration.
Found in
N/A (metabolic process)
Related
AMPK · mTOR · Autophagy · Mitophagy · Glycogen · Gluconeogenesis · OMAD
References
  1. Shirwany NA, Zou MH. AMPK in cardiovascular health and disease. Acta Pharmacologica Sinica. 2010. PMID 20711221 | PMC Full Text
  2. Saxton RA, Sabatini DM. mTOR Signaling in Growth, Metabolism, and Disease. Cell. 2017;168(6):960-976. PMID 28283069 | PMC Full Text

CD38

Full name
CD38 (Cluster of Differentiation 38)
Type
NAD+-consuming enzyme / longevity target
What it does
The primary enzyme responsible for NAD+ degradation in cells, consuming large quantities of NAD+ as a substrate.1 CD38 activity increases with age and inflammation, contributing substantially to the age-related NAD+ decline (approximately 50% per decade after 30).1 Inhibiting CD38 preserves cellular NAD+ levels, making it a primary target for longevity and metabolic health.
Benefits
Preserving NAD+ for use by sirtuins, PARP (DNA repair), and energy metabolism.1 This is the primary mechanism by which apigenin potentiates NMN supplementation: more NAD+ synthesised via NMN is preserved when CD38 is inhibited.1 Pharmacological inhibition of CD38 reverses age-related NAD+ metabolic decline and hematopoietic stem cell deterioration in preclinical models.2
Risks/considerations
CD38 also has immune signalling roles (calcium mobilisation, cell adhesion). Complete inhibition is not the goal; gentle inhibition via apigenin at standard supplemental doses is appropriate and well-tolerated.
Optimal dosing
Endogenous enzyme: managed via inhibition. Antioxidant | Apigenin (50-100 mg/day) is the primary natural CD38 inhibitor; quercetin is an alternative.
Found in
N/A (endogenous enzyme)
Related
NAD+ · Apigenin · NMN · Sirtuins
References
  1. Camacho-Pereira J, et al. CD38 Dictates Age-Related NAD+ Decline and Mitochondrial Dysfunction through an SIRT3-Dependent Mechanism. Cell Metabolism. 2016;23(6):1127-1139. PMID 27304511 | PMC Full Text
  2. Song Z, et al. An NAD-dependent metabolic checkpoint regulates hematopoietic stem cell activation and aging. Nature Aging. 2024;4(10):1384-1393. PMID 39044033 | PMC Full Text

Chelation

Full name
Chelation (from Greek: chele, claw)
Type
Biochemical process / mineral binding mechanism
What it does

The process by which a molecule (the chelating agent) forms multiple coordinate bonds with a metal ion, effectively gripping and sequestering it. The "claw" analogy is precise: the chelator wraps around the metal from multiple binding sites simultaneously, creating a stable ring structure that holds the metal far more strongly than a single-point bond. Chelation operates in three distinct and important contexts in a longevity supplement stack.

The first is detoxification. Compounds like R-ALA and NAC bind heavy metals (lead, mercury, cadmium, arsenic) in tissues and blood, making them water-soluble for urinary excretion. This is a recognised mechanism of both compounds and is particularly relevant for individuals with impaired Phase II conjugation capacity, for whom reducing toxic metal burden is a priority.

The second is mineral bioavailability. Amino acid chelates: magnesium glycinate, zinc bisglycinate, and professional-grade mineral supplements using Albion/TRAACS chelate forms: bond minerals to amino acids before ingestion. The amino acid acts as a carrier that is recognised by intestinal peptide transporters rather than mineral ion channels, bypassing competition with other minerals, surviving stomach acid intact, and delivering significantly higher absorption than inorganic mineral forms (oxides, carbonates, sulfates). This is why form matters as much as dose when evaluating a mineral supplement.

The third is mineral antagonism. Zinc and copper compete for the same intestinal transporters. High-dose zinc supplementation effectively out-competes copper for binding sites, reducing copper absorption. A 10:1 zinc:copper ratio is a standard safeguard against functional copper deficiency at supplemental zinc doses.

Benefits
Understanding chelation clarifies why supplement form determines bioavailability (amino acid chelates vs. oxides), why R-ALA and NAC support detoxification beyond their antioxidant roles, and why mineral ratios matter as much as individual doses.
Risks/considerations
NAC's chelating activity means it should be taken away from zinc and methylcobalamin to avoid reducing their bioavailability. R-ALA's metal chelation is generally beneficial but theoretical concern exists around chelating essential minerals at very high doses: standard supplemental doses (100-300 mg Na-RALA) do not present this risk.
Optimal dosing
N/A (biochemical process). Managed via supplement form selection (amino acid chelates preferred) and timing (NAC separated from zinc and B12).
Found in
N/A (chemical process; chelating agents present in food and supplements)
Related
NAC · R-ALA · Zinc · Copper · Magnesium · Phase II Detoxification · Glutathione · Lead · Mercury · Cadmium · Arsenic
References
  1. Camacho-Pereira J, Tarragó MG, Chini CCS, et al. CD38 Dictates Age-Related NAD Decline and Mitochondrial Dysfunction through an SIRT3-Dependent Mechanism. Cell Metabolism. 2016;23(6):1127-1139. PMID 27304511 | PMC Full Text

Ferroptosis

Full name
Ferroptosis (iron-mediated programmed cell death)
Type
Cell death mechanism
What it does
A form of regulated cell death driven by iron-dependent lipid peroxidation. When cell membranes become too fluid (excess polyunsaturated fatty acid content, insufficient saturated fatty acid structural support), iron catalyses a chain reaction of lipid oxidation that destroys the cell. Implicated in aging, neurodegeneration, and cancer.
Benefits
Understanding ferroptosis informs the C15:0 supplementation strategy (membrane rigidity restoration) and the antioxidant stack.
Risks/considerations
Promoted by membrane fragility, excess iron, depleted glutathione. Mitigated by C15:0, CoQ10 (membrane antioxidant), glutathione, and selenium (GPx4 cofactor).
Found in
N/A (pathological process)
Related
C15:0 · Glutathione · CoQ10 · Selenium

GABA-A Receptor

Full name
Gamma-Aminobutyric Acid Type A Receptor (GABA-A)
Type
Inhibitory neurotransmitter receptor / neurological mechanism
What it does
A ligand-gated chloride ion channel and the principal mediator of fast inhibitory neurotransmission in the CNS. When GABA (the brain's primary inhibitory neurotransmitter) binds, chloride ions flood the neuron, hyperpolarising it and reducing firing rate. Net effect: reduced neural excitability, anxiolysis, and promotion of sleep. Several supplemental compounds act at or adjacent to this receptor: Apigenin (positive allosteric modulator, same site as benzodiazepines but weaker and non-addictive), L-Theanine (modulates GABA receptor activity), and Magnesium (activates GABA receptors at bedtime, supporting sleep quality and HRV). Pyridoxal-5-Phosphate (B6) is the cofactor for glutamate decarboxylase, the enzyme that synthesises GABA from glutamate: B6 deficiency directly impairs GABA production.
Benefits
Anxiety reduction, sleep onset support, reduced sleep stress, parasympathetic tone. Several supplemental compounds converge on this pathway, making it a useful lever for sleep quality.
Risks/considerations
Direct GABA-A agonists (benzodiazepines, alcohol) cause tolerance, dependence, and rebound anxiety. Natural compounds that support GABA-A are modulatory rather than direct agonists: they enhance the receptor's sensitivity to endogenous GABA without causing the same receptor downregulation.
Optimal dosing
N/A (endogenous receptor system). Supported indirectly via Apigenin (50-100 mg), Magnesium glycinate (300-500 mg), L-Theanine (200-400 mg), and adequate P5P for GABA synthesis.
Found in
N/A (endogenous receptor system)
Related
Apigenin · L-Theanine · Magnesium · Pyridoxal-5-Phosphate (B6) · HRV

Gluconeogenesis

Full name
Gluconeogenesis (GNG)
Type
Metabolic pathway / glucose synthesis
What it does
The metabolic pathway by which the liver (and to a lesser extent the kidneys) synthesises glucose from non-carbohydrate precursors: primarily lactate, glycerol, and glucogenic amino acids (especially alanine and glutamine). Activated during fasting when glycogen stores are depleted. Pyruvate carboxylase (requiring Biotin) is a key regulatory enzyme in the pathway. Gluconeogenesis ensures blood glucose remains available for the brain and red blood cells during extended fasting even after glycogen is exhausted.
Benefits
Blood glucose maintenance during fasting, metabolic flexibility, fat adaptation. In the context of OMAD, gluconeogenesis sustains glucose supply during the fasting window without requiring dietary carbohydrates.
Risks/considerations
Excessive gluconeogenesis can impair ketosis and fat adaptation at very low protein intakes, as glucogenic amino acids from muscle protein can provide substrate. Adequate dietary protein (not excess) balances muscle preservation with metabolic efficiency.
Optimal dosing
N/A (endogenous pathway). Supported by fasting and adequate Biotin for pyruvate carboxylase function.
Found in
N/A (hepatic and renal pathway)
Related
Glycogen · Catabolism · AMPK · Biotin · Carboxylase · OMAD

HDAC (Histone Deacetylase)

Full name
Histone Deacetylase (HDAC)
Type
Epigenetic enzyme / gene expression regulator
What it does
A class of enzymes that remove acetyl groups from histone proteins, causing chromatin to condense and gene expression to be silenced. The counterpart to HATs (histone acetyltransferases), which add acetyl groups and open chromatin for transcription. HDAC inhibition: keeping histones acetylated: generally promotes anti-inflammatory and anti-cancer gene expression profiles. Butyrate is a natural HDAC inhibitor produced by gut bacteria, linking gut microbiome health directly to epigenetic gene regulation. Sirtuins (SIRT1-7) are a related class called Class III HDACs, though they use a distinct NAD+-dependent mechanism rather than simple deacetylation.
Benefits
HDAC inhibition promotes anti-inflammatory gene expression, tumour suppressor gene activation, and improved gut barrier integrity. The butyrate-HDAC axis is a key mechanism linking dietary fibre, gut microbiome health, and cancer risk reduction.
Risks/considerations
Context-dependent: HDAC inhibition is beneficial in inflammatory and cancer contexts but the full picture is complex. Protocol support comes via Butyrate (gut-produced and supplemented) rather than pharmaceutical HDAC inhibitors.
Optimal dosing
N/A (enzyme class). Inhibited naturally via Butyrate production from fermentable fibre and direct supplementation.
Found in
N/A (endogenous enzyme class)
Related
Butyrate / Sodium Butyrate · Sirtuins · NAD+

Hydroxylation

Full name
Hydroxylation (enzymatic oxidation reaction)
Type
Biochemical reaction / post-translational modification
What it does
The addition of a hydroxyl group (-OH) to a substrate, catalysed by hydroxylase enzymes. Broadly important in metabolism: Phase I detoxification (cytochrome P450 hydroxylases oxidise xenobiotics for Phase II conjugation), steroid hormone synthesis (cholesterol hydroxylation), collagen maturation (prolyl and lysyl hydroxylases cross-link collagen for tensile strength, both requiring Vitamin C as cofactor), and Vitamin D3 activation (25-hydroxylation in the liver, then 1-alpha hydroxylation in the kidney to produce active 1,25-OH2D3). Vitamin C deficiency specifically impairs collagen hydroxylation, causing scurvy: the connective tissue falls apart because the collagen triple helix cannot form without hydroxyproline.
Benefits
N/A (reaction class). Understanding hydroxylation explains why Vitamin C must accompany collagen supplementation, why Vitamin D3 requires hepatic and renal activation, and how liver health affects Phase I detoxification capacity.
Risks/considerations
CYP450 enzyme variants (e.g., CYP2R1 for 25-hydroxylation of D3) affect hydroxylation efficiency and thus downstream hormone or metabolite production: relevant to Vitamin D3 dosing requirements.
Optimal dosing
N/A (reaction class). Supported by adequate Vitamin C for collagen hydroxylation, and liver/kidney health for vitamin D activation.
Found in
N/A (enzymatic reaction occurring throughout the body)
Related
Vitamin C · Collagen Peptides · Vitamin D3 · Phase II Detoxification

Ketogenesis

Full name
Ketogenesis (ketone body synthesis)
Type
Metabolic pathway / alternative fuel production
What it does
The hepatic (liver) pathway that converts acetyl-CoA into ketone bodies: acetoacetate, beta-hydroxybutyrate (BHB), and acetone: when glucose availability is low and acetyl-CoA exceeds the TCA cycle's capacity to process it. This occurs during fasting, carbohydrate restriction, and prolonged exercise. Ketone bodies are exported to peripheral tissues (brain, heart, muscle) where they are oxidised for ATP production. Beta-hydroxybutyrate is also a signalling molecule: it inhibits HDACs, activates Sirtuins, reduces NLRP3 inflammasome activity, and has neuroprotective effects beyond its role as a fuel. OMAD reliably induces ketogenesis within the fasting window; extended fasts push deeper ketosis.
Benefits
Alternative fuel for brain and heart (glucose-independent energy), anti-inflammatory (BHB as signalling molecule), HDAC inhibition, neuroprotection, appetite suppression, metabolic flexibility.
Risks/considerations
Ketoacidosis (dangerously high ketone levels) is a risk only in type 1 diabetes: nutritional ketosis from fasting or diet is self-limiting in metabolically healthy individuals. Electrolyte management (sodium, potassium, magnesium) is important during sustained ketosis as ketone excretion carries electrolytes.
Optimal dosing
N/A (metabolic pathway). Activated by OMAD fasting window, extended fasts, and carbohydrate restriction. Metabolic flexibility (rapid ketosis onset) develops with consistent fasting practice.
Found in
N/A (hepatic pathway)
Related
CoA · TCA Cycle · OMAD · AMPK · HDAC · Sirtuins

Methylation Cycle

Full name
One-Carbon Methylation Cycle (Methionine Cycle)
Type
Core biochemical pathway
What it does
A cycle of chemical reactions that transfers methyl groups (CH3) to DNA, proteins, neurotransmitters, and phospholipids. Drives: gene expression regulation (epigenetics), neurotransmitter synthesis and breakdown, detoxification, immune function, and homocysteine metabolism. Inputs: methylfolate, methylcobalamin, TMG, riboflavin (B2 as MTHFR cofactor). Output: SAMe (universal methyl donor). MTHFR TT impairs the key enzymatic step by 70-80%.
Benefits
Underpins virtually every regulatory biological process. Optimising methylation improves HRV, cognitive function, detoxification, mood, muscle synthesis, and reduces cardiovascular risk.
Risks/considerations
Where MTHFR activity is reduced, bypassing the impaired enzyme with methylfolate (not folic acid) is essential. Overmethylation (anxiety, irritability, histamine reactions) can occur when methyl donor intake outpaces demand; see Genetic qualifiers for the role of COMT.
Optimal dosing
Requires adequate methylfolate, methylcobalamin (B12), TMG, riboflavin (B2), and P5P (B6). See individual compound entries for population-level doses.
Genetic qualifiers
MTHFR TT: 70-80% reduced enzyme activity; the primary genetic driver for methylation support intervention; requires substantially higher methylfolate and TMG than the general population: see individual entries for variant-specific dose guidance. COMT GG: fast clearance, low overmethylation risk. PEMT CT: impaired phosphatidylcholine synthesis downstream of methylation.
Found in
N/A (biochemical pathway)
Related
Methylfolate · B12 · TMG · Riboflavin · SAMe · Homocysteine · Transsulfuration
References
  1. Huang X, et al. Optimal folic acid dosage in lowering homocysteine: Precision Folic Acid Trial to lower homocysteine (PFAT-Hcy). European Journal of Nutrition. 2024. PMID 38478042 (RCT, n=2697; MTHFR TT subgroup requires substantially higher folate for equivalent homocysteine reduction)

MGP (Matrix Gla Protein)

Full name
Matrix Gla Protein (MGP)
Type
Vitamin K-dependent protein / calcification inhibitor
What it does
The most potent known inhibitor of soft tissue calcification. MGP is produced by vascular smooth muscle cells and chondrocytes and must be carboxylated (activated) by Vitamin K2 MK-4 to function. Uncarboxylated (inactive) MGP accumulates at calcification sites and cannot prevent calcium deposition. Adequate K2 keeps MGP fully carboxylated and active, directing calcium to bone and away from arterial walls and other soft tissues. MGP activation is one of the primary mechanisms by which K2 reduces cardiovascular calcification risk independent of Vitamin K1.
Benefits
Arterial wall protection, soft tissue calcification prevention, joint health. The K2-MGP axis is why adequate K2 is non-negotiable when supplementing calcium or Vitamin D3 at higher doses: D3 increases calcium absorption and K2 ensures it goes to the right place.
Risks/considerations
MGP deficiency (functional, from K2 insufficiency) is common in the general population: most people are K2-deficient relative to the amounts needed for full MGP carboxylation. Warfarin directly inhibits K2-dependent carboxylation, leaving MGP inactive; this is part of the mechanism behind warfarin-associated vascular calcification.
Optimal dosing
N/A (endogenous protein). Maintained via adequate Vitamin K2 MK-4 (1,000-5,000 mcg/day) and Vitamin K2 MK-7 (100-300 mcg/day).
Found in
N/A (produced in vascular and cartilage tissue)
Related
Vitamin K2 MK-4 · Vitamin K2 MK-7 · Calcium · Vitamin D3 · Warfarin

Mitochondrial Biogenesis

Full name
Mitochondrial Biogenesis
Type
Cellular mechanism
What it does
The process of generating new mitochondria within cells. Driven by PGC-1alpha (master regulator), activated by AMPK (fasting, exercise), NAD+/Sirtuins, and certain compounds (PQQ, NMN, urolithin A, C15:0). More and healthier mitochondria = greater energy production capacity, better metabolic health, improved longevity.
Benefits
Increased ATP production, improved metabolic flexibility, better fat oxidation, reduced aging-related decline.
Risks/considerations
Requires the raw materials and signalling molecules across the mitochondrial stack to function optimally.
Found in
N/A (cellular process)
Related
AMPK · NAD+ · Sirtuins · PQQ · Urolithin A · C15:0 · CoQ10

Mitophagy

Full name
Mitophagy (mitochondria + autophagy)
Type
Selective cellular recycling mechanism
What it does
The selective form of autophagy that specifically targets and degrades damaged, dysfunctional, or superfluous mitochondria. Where general autophagy recycles cellular debris broadly, mitophagy is quality control for the mitochondrial network specifically. Triggered by mitochondrial membrane potential loss, oxidative damage, or energy stress. Urolithin A is the only compound shown to directly activate mitophagy at clinically validated doses in humans. Also activated by fasting (AMPK), OMAD, and extended fasts.
Benefits
Mitochondrial quality control, removal of ROS-generating damaged mitochondria, stimulation of mitochondrial biogenesis to replace cleared mitochondria, energy metabolism efficiency, longevity. Extended fasts (48-80 hours) are particularly effective for driving deep mitophagy, clearing accumulated dysfunctional mitochondria that shorter fasting windows cannot reach.
Risks/considerations
Suppressed by chronic mTOR activation (frequent feeding). OMAD optimises the daily mitophagy window; extended fasts push deeper clearance.
Optimal dosing
Endogenous. Activated by urolithin A (500 mg/day), fasting, and OMAD.
Found in
N/A (endogenous process)
Related
Autophagy · Urolithin A · Mitochondrial Biogenesis · AMPK · mTOR · OMAD

mTOR

Full name
Mechanistic Target of Rapamycin (mTORC1)
Type
Cellular growth and anabolism sensor / pathway
What it does
The master switch for protein synthesis, cell growth, and anabolic processes. Activated by amino acids (especially leucine), insulin, and growth factors. Suppresses autophagy when active. OMAD timing creates a daily cycle: fasted state (AMPK active, autophagy on, mTOR suppressed) followed by feeding window (mTOR activated, protein synthesis triggered). This oscillation is superior to constant mTOR activation or constant suppression.
Benefits
Muscle protein synthesis, cellular growth, repair. The feed-fast oscillation via OMAD optimises both anabolic (mTOR) and catabolic/recycling (autophagy/AMPK) phases.
Risks/considerations
Chronic mTOR activation (frequent high-protein meals) suppresses autophagy and is associated with accelerated aging. OMAD provides the ideal cycling pattern.
Found in
N/A (endogenous pathway)
Related
AMPK · Autophagy · EAAs · HMB · Enterocyte

Nrf2

Full name
Nuclear Factor Erythroid 2-Related Factor 2 (Nrf2)
Type
Transcription factor / antioxidant gene regulator
What it does
A master transcription factor that, when activated, translocates to the nucleus and switches on a battery of cytoprotective genes: antioxidant enzymes (glutathione synthesis, superoxide dismutase, catalase), Phase II detoxification enzymes, and anti-inflammatory proteins. Under basal conditions Nrf2 is kept inactive by its repressor KEAP1. Electrophilic or oxidative stress modifies KEAP1, releasing Nrf2 to activate gene expression. Multiple protocol compounds are Nrf2 activators: Berberine, Silymarin, Curcumin, and R-ALA.
Benefits
Upregulation of glutathione synthesis, Phase II detoxification induction, anti-inflammatory, neuroprotection, cancer risk reduction. Individuals with reduced Phase II glutathione conjugation capacity (GSTP1 GG variant) benefit particularly from Nrf2-driven Phase II induction as a compensating mechanism.
Risks/considerations
Chronic maximal Nrf2 activation can paradoxically impair some cancer-suppressive mechanisms. Dietary and supplement Nrf2 activators operate at physiological induction levels, not pharmacological saturation.
Optimal dosing
N/A (endogenous transcription factor). Activated via dietary and supplement Nrf2 inducers: Berberine, Silymarin, Curcumin, R-ALA, sulforaphane (from broccoli sprouts), and fasting.
Genetic qualifiers
GSTP1 GG: reduced glutathione conjugation capacity makes Nrf2-driven Phase II induction particularly relevant for compensating the bottleneck.
Found in
N/A (endogenous transcription factor)
Related
Phase II Detoxification · Glutathione · Berberine · Milk Thistle / Silymarin · Curcumin / Turmeric · R-ALA

Phase II Detoxification

Full name
Phase II Biotransformation / Conjugation Reactions
Type
Hepatic detoxification pathway
What it does
The second stage of liver detoxification, where reactive intermediates created in Phase I (cytochrome P450 reactions) are conjugated to water-soluble molecules (glutathione, sulfate, glucuronate, glycine, acetyl groups) for excretion. GSTP1 is the primary glutathione S-transferase enzyme. GSTP1 GG reduces conjugation activity, extending the window during which reactive metabolites circulate before clearance.
Benefits
Efficient Phase II prevents reactive metabolite accumulation that causes tissue damage, allergic responses, and carcinogenesis.
Risks/considerations
In individuals with reduced conjugation capacity (such as GSTP1 GG carriers), reactive metabolites circulate longer before clearance. Improving substrate availability (NAC, glutathione), supporting Phase II inducers (silymarin, berberine, Nrf2 activators), and methylation support that improves transsulfuration all mitigate this.
Genetic qualifiers
GSTP1 GG: reduced Phase II glutathione conjugation capacity; individuals with this variant clear certain reactive metabolites and xenobiotics more slowly and may have heightened sensitivity to detoxification-relevant supplements and environmental exposures.
Found in
N/A (hepatic process)
Related
Glutathione · NAC · Milk Thistle · Berberine · Transsulfuration

PPAR (Peroxisome Proliferator-Activated Receptor)

Full name
Peroxisome Proliferator-Activated Receptor (PPAR)
Type
Nuclear receptor transcription factor / metabolic regulator
What it does
A family of nuclear receptors (PPARα, PPARδ/β, PPARγ) that act as transcription factors regulating genes involved in fat metabolism, energy homeostasis, and inflammation. Each subtype has distinct tissue distribution and function. PPARα (liver, muscle): activated by fasting and fatty acids; drives fat oxidation, ketogenesis, and mitochondrial biogenesis. PPARδ (ubiquitous): drives fat burning in muscle and endurance adaptation. PPARγ (adipose tissue): regulates adipogenesis and insulin sensitization; target of thiazolidinedione diabetes drugs. Several protocol compounds are PPAR agonists: C15:0 (PPARα/δ), CLA (PPARγ), and Omega-3 fatty acids (PPARα).
Benefits
Fat oxidation, mitochondrial biogenesis, insulin sensitization, anti-inflammatory gene expression, endurance adaptation. PPARα activation during the fasting window complements AMPK signalling.
Risks/considerations
N/A at dietary activation levels. Pharmaceutical PPARγ agonists (thiazolidinediones) have significant side effects; dietary PPAR activation is qualitatively different.
Optimal dosing
N/A (endogenous receptor). Activated by C15:0 (PPARα/δ agonist), CLA (PPARγ), and OMAD fasting (PPARα via elevated free fatty acids).
Found in
N/A (endogenous receptor family)
Related
C15:0 · CLA · AMPK · Mitochondrial Biogenesis · OMAD

Senolytic

Full name
Senolytic (senescent cell eliminating compound)
Type
Longevity intervention / cellular housekeeping
What it does
Compounds that selectively induce apoptosis (programmed death) in senescent cells: cells that have stopped dividing but resist apoptosis, accumulate with age, and secrete the Senescence-Associated Secretory Phenotype (SASP): a cocktail of inflammatory cytokines, proteases, and growth factors that damage surrounding tissue and drive chronic inflammation. Senolytics clear these "zombie cells," reducing the chronic inflammatory burden they create. Distinct from senostatics, which suppress SASP without clearing the cells. The two main natural senolytic compounds are Fisetin (the most potent natural senolytic identified) and Quercetin; the pharmaceutical combination Dasatinib + Quercetin (D+Q) is the most studied clinical protocol.
Benefits
Reduced chronic inflammation, tissue rejuvenation, improved organ function, reduced cancer risk, longevity. Particularly valuable as pulse/cycling protocols rather than daily use: senescent cells accumulate over weeks to months, so periodic high-dose clearance is more targeted than low daily doses.
Risks/considerations
Daily low-dose senolytic supplementation has limited value; the clearance mechanism requires pulse dosing (~20 mg/kg Fisetin or equivalent) to achieve meaningful senescent cell elimination. Reserve senolytics for periodic pulse protocols rather than daily maintenance use. Senolytics may transiently impair wound healing immediately after dosing as some tissue-maintenance senescent cells are cleared alongside pathological ones.
Optimal dosing
Pulse protocol. Fisetin: ~20 mg/kg body weight for 2-3 consecutive days, repeated every 2-3 months. Not for daily use at standard supplement doses.
Found in
Fisetin (strawberries, apples, onions), Quercetin (capers, onions, apples). Pharmaceutical senolytic Dasatinib requires prescription.
Related
Autophagy · C15:0 · Fisetin · OMAD

Sirtuins

Full name
Sirtuins (SIRT1-7)
Type
NAD+-dependent longevity proteins / epigenetic regulators
What it does
A family of proteins that require NAD+ as a co-substrate to function. They deacetylate histones and other proteins, regulating gene expression, DNA repair, inflammation, metabolism, and stress resistance. SIRT1 is the primary longevity sirtuin (activated by resveratrol and caloric restriction). SIRT3 protects mitochondria. All sirtuins decline with age as NAD+ levels drop.
Benefits
Longevity signalling, DNA repair, metabolic health, inflammation modulation, mitochondrial protection.
Risks/considerations
Sirtuin activity depends entirely on adequate NAD+: NMN supplementation is the primary strategy to maintain the substrate.
Found in
N/A (endogenous proteins)
Related
NAD+ · NMN · Resveratrol · Autophagy

TCA Cycle (Krebs Cycle)

Full name
Tricarboxylic Acid Cycle / Citric Acid Cycle / Krebs Cycle
Type
Central metabolic pathway / energy production hub
What it does
The central metabolic pathway of aerobic energy production, occurring in the mitochondrial matrix. Acetyl-CoA enters the cycle and is oxidised through a series of reactions, generating NADH and FADH2 (electron carriers for oxidative phosphorylation), ATP directly, and CO2 as a byproduct. Also serves as a biosynthetic hub: TCA intermediates are constantly drawn off for amino acid synthesis, gluconeogenesis, fatty acid synthesis, haem synthesis, and neurotransmitter production. Anaplerosis replenishes these intermediates to keep the cycle running. Key cofactors: Thiamin (B1) (pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase), Riboflavin (B2) (FADH2 production), NAD+ (NADH production), Magnesium, and Manganese.
Benefits
ATP production (indirect, via electron transport chain), biosynthetic precursor generation, metabolic flexibility. TCA cycle efficiency underpins the mitochondrial function that mitochondrial supplements aim to support.
Risks/considerations
TCA cycle impairment from B vitamin deficiencies (especially B1, B2, B3) manifests as reduced energy production, metabolic inflexibility, and neurological symptoms. OMAD shifts fuel from glucose to fatty acids via acetyl-CoA: the TCA cycle runs on both.
Optimal dosing
N/A (endogenous pathway). Supported by adequate B1, B2, NAD+ (via NMN), CoQ10, and Magnesium.
Found in
N/A (mitochondrial pathway)
Related
CoA · ATP · Anaplerosis · NAD+ · Thiamin (B1) · Mitochondrial Biogenesis

Telomeres

Full name
Telomeres (chromosomal end caps)
Type
Chromosomal structure / biological aging clock
What it does
Repetitive DNA sequences (TTAGGG) at chromosome ends that protect chromosomes from degradation. Shorten with each cell division. Critically short telomeres trigger cell senescence or apoptosis. Multiple genetic variants (TERT, ACYP2, OBFC1, RTEL1, NAF1) in the profile are associated with accelerated telomere shortening.
Benefits
Longer telomeres = more replicative capacity, slower cellular aging. Interventions: adequate sleep, exercise, stress reduction, omega-3s, antioxidants, Vitamin D3.
Risks/considerations
Abnormally long telomeres (as in some cancers) are also pathological. The goal is optimal maintenance, not maximum length.
Genetic qualifiers
Polymorphisms in TERT, ACYP2, OBFC1, RTEL1, and NAF1 are each independently associated with shorter telomere length. Individuals carrying multiple such variants have a cumulative predisposition toward accelerated telomere attrition; telomere-supportive lifestyle and nutritional interventions carry greater relevance for this group.
Found in
N/A (chromosomal structure)
Related
Vitamin D3 · Omega-3 · Urolithin A · Eannatto

Transsulfuration Pathway

Full name
Transsulfuration Pathway
Type
Biochemical pathway / homocysteine disposal route
What it does
Converts homocysteine to cystathionine (CBS enzyme, B6-dependent) to cysteine (CSE enzyme) to glutathione / taurine / other sulfur compounds. The second major route for homocysteine disposal (alongside remethylation via MTHFR). Cysteine produced here is the rate-limiting precursor for glutathione synthesis. Better methylation status increases transsulfuration flux, since SAMe activates the CBS enzyme.
Benefits
Homocysteine disposal, glutathione production, taurine synthesis, sulfur amino acid metabolism.
Risks/considerations
Requires adequate B6 (P5P) as cofactor. Impaired by vitamin B6 deficiency.
Optimal dosing
Pathway. Supported by adequate P5P (25-100 mg/day), NAC (600-1,800 mg/day for cysteine supply), and methylation optimisation.
Genetic qualifiers
MTHFR TT: transsulfuration is an important complementary homocysteine disposal route when the methylation remethylation pathway is impaired. GSTP1 GG: transsulfuration output (cysteine to glutathione) is particularly important given reduced Phase II conjugation activity.
Found in
N/A (biochemical pathway)
Related
Methylation Cycle · Homocysteine · Glutathione · NAC · P5P
References
  1. Marroncini G, et al. Hyperhomocysteinemia and Disease-Is 10 μmol/L a Suitable New Threshold Limit? Int J Mol Sci. 2024;25(22). PMID 39596358 (review; covers remethylation and transsulfuration as dual homocysteine disposal routes; confirms B6 as cofactor for CBS and CSE enzymes; discusses disease risk even at mildly elevated homocysteine)
  2. Dalto DB, Matte JJ. Pyridoxine (Vitamin B₆) and the Glutathione Peroxidase System; a Link between One-Carbon Metabolism and Antioxidation. Nutrients. 2017;9(3). PMID 28245568 (review; B6-dependent enzymes catalyse transsulfuration pathway reactions driving homocysteine to cysteine and further into glutathione peroxidase proteins; B6 identified as rate-limiting cofactor)

The BioForge Glossary · 13 entries

Molecules and Signalling

Endogenous molecules, cofactors, neurotransmitters, and signalling intermediates.

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Acetylcholine

Full name
Acetylcholine (ACh)
Type
Neuromodulator | Neurotransmitter / neuromodulator
What it does
The primary neurotransmitter of the parasympathetic nervous system and the neuromuscular junction. In the brain, acetylcholine modulates attention, learning, memory consolidation (especially REM-dependent memory), and arousal.2 In the periphery, it drives parasympathetic tone (rest-and-digest), reducing heart rate and promoting digestion. Synthesised from choline and acetyl-CoA (from Pantothenic Acid via CoA).1 Phospholipid | Phosphatidylcholine is both a membrane component and a choline reservoir for acetylcholine synthesis.
Benefits
Cognitive function (attention, memory, learning), parasympathetic tone, REM sleep quality, neuromuscular function.
Risks/considerations
Cholinergic excess (too much acetylcholine activity) causes nausea, GI cramping, and bradycardia. This can occur with very high choline doses or cholinesterase inhibitors. Choline supplementation at standard doses does not typically cause this.
Optimal dosing
N/A (endogenous neurotransmitter). Supported by adequate Choline intake (500-1,000 mg/day), Phosphatidylcholine, and Pantothenic Acid for CoA synthesis.
Found in
N/A (produced endogenously in cholinergic neurons)
Related
Choline · Phosphatidylcholine · Pantothenic Acid (B5) · CoA
References
  1. Ferreira-Vieira TH, et al. Alzheimer's disease: Targeting the Cholinergic System. Current Neuropharmacology. 2016;14(1):101-15. PMID 26813123 | PMC Full Text
  2. Klinkenberg I, Sambeth A, Blokland A. Acetylcholine and attention. Behavioural Brain Research. 2010;221(2):430-42. PMID 21108972 (abstract only)

ADP

Full name
Adenosine Diphosphate
Type
Cellular energy intermediate / nucleotide
What it does
The intermediate energy form between Arsenic | ATP and AMP. When ATP releases energy via hydrolysis, it first becomes Adaptogen | ADP (losing one phosphate group), then AMP (losing a second). ADP is recycled back to ATP primarily through oxidative phosphorylation in the mitochondria, driven by the proton gradient across the inner mitochondrial membrane.1 Creatine phosphate can also donate a phosphate directly to ADP to rapidly regenerate ATP during short high-intensity efforts.2
Benefits
N/A (intermediate metabolite). Supporting efficient ADP→ATP recycling is the goal of the mitochondrial stack.
Risks/considerations
N/A
Optimal dosing
Endogenous. Recycling efficiency is supported by CoQ10, PQQ, NMN, and Creatine.
Found in
N/A (produced endogenously via ATP hydrolysis)
Related
ATP · AMP · AMPK · Creatine · CoQ10
References
  1. Mnatsakanyan N, Jonas EA. The new role of F(1)F(o) ATP synthase in mitochondria-mediated neurodegeneration and neuroprotection. Experimental Neurology. 2020. PMID 32653453 | PMC Full Text
  2. Forbes SC, Candow DG, et al. Creatine supplementation and endurance performance: surges and sprints to win the race. Journal of the International Society of Sports Nutrition. 2023. PMID 37096381 | PMC Full Text

AMP

Full name
Adenosine Monophosphate
Type
Cellular energy signal / nucleotide
What it does
The low-energy form of the cell's energy currency. When ATP is hydrolysed to release energy, it degrades first to ADP (Adenosine Diphosphate) and then to AMP. A high AMP:ATP ratio signals cellular energy deficit, directly activating AMPK: the master metabolic switch.1 AMP thus functions as the molecular trigger that initiates the fasting and energy-stress response cascade.
Benefits
N/A (signalling molecule). Understanding AMP's role clarifies why fasting and exercise activate AMPK: both states raise the AMP:ATP ratio.
Risks/considerations
N/A
Optimal dosing
Endogenous. Ratio is managed via fasting duration and exercise intensity.
Found in
N/A (produced endogenously via ATP hydrolysis)
Related
ADP · ATP · AMPK
References
  1. Shirwany NA, Zou MH. AMPK in cardiovascular health and disease. Acta Pharmacologica Sinica. 2010. PMID 20711221 | PMC Full Text

ATP

Full name
Adenosine Triphosphate
Type
Cellular energy currency / mechanism
What it does
The universal energy carrier in all living cells. Generated primarily through oxidative phosphorylation in the mitochondria.1 Every cellular process requiring energy: muscle contraction, protein synthesis, ion pumping, DNA repair: runs on ATP hydrolysis.
Benefits
N/A: fundamental to life. Supporting ATP production is the goal of much of the mitochondrial stack (CoQ10, PQQ, NMN, Urolithin A, Creatine).
Risks/considerations
N/A
Optimal dosing
Endogenous. Creatine phosphate system buffers ATP availability for short-duration high-intensity efforts.2
Found in
N/A (produced in mitochondria)
Related
ADP · AMP · AMPK · CoQ10 · Creatine · Mitochondrial Biogenesis · NAD+ · NMN
References
  1. Mnatsakanyan N, Jonas EA. The new role of F(1)F(o) ATP synthase in mitochondria-mediated neurodegeneration and neuroprotection. Experimental Neurology. 2020. PMID 32653453 | PMC Full Text
  2. Forbes SC, Candow DG, et al. Creatine supplementation and endurance performance: surges and sprints to win the race. Journal of the International Society of Sports Nutrition. 2023. PMID 37096381 | PMC Full Text

CoA (Coenzyme A)

Full name
Coenzyme A (CoA)
Type
Essential coenzyme / metabolic carrier
What it does
A universal acyl group carrier involved in over 100 metabolic reactions. Synthesised from Pantothenic Acid (B5), cysteine, and ATP. Acetyl-CoA (its most important form) sits at the intersection of carbohydrate, fat, and protein metabolism: it is the entry point to the TCA cycle, the substrate for fatty acid synthesis, and the precursor to acetylcholine, ketone bodies, cholesterol, and steroid hormones. Malonyl-CoA regulates fat oxidation vs. synthesis. Succinyl-CoA is a TCA intermediate and haem synthesis precursor. Without adequate Pantothenic Acid, CoA synthesis is impaired and all of these pathways suffer simultaneously.
Benefits
Central to energy metabolism (ATP production), fat oxidation, neurotransmitter synthesis (acetylcholine), ketogenesis, hormone synthesis, and anaplerosis.
Risks/considerations
N/A at dietary support levels. Pantothenic Acid deficiency is rare but impairs CoA-dependent pathways broadly.
Optimal dosing
N/A (endogenous coenzyme). Synthesis depends on adequate Pantothenic Acid (5-10 mg/day RDA; B complex supplementation typically provides 50-500 mg/day).
Found in
N/A (produced endogenously from Pantothenic Acid)
Related
Pantothenic Acid (B5) · ATP · TCA Cycle · Ketogenesis · Acetylcholine · Anaplerosis · Catabolism

Cysteine

Full name
L-Cysteine
Type
Conditionally essential amino acid / glutathione precursor
What it does
A sulfur-containing amino acid that is the rate-limiting precursor to glutathione synthesis. Synthesised endogenously via the transsulfuration pathway from homocysteine (requiring P5P as cofactor). Also a component of CoA synthesis. "Conditionally essential" means it can be synthesised endogenously but synthesis may be insufficient under high oxidative stress, illness, or impaired transsulfuration. NAC (N-Acetyl Cysteine) is the primary supplemental cysteine source: the acetyl group improves stability and bioavailability, and is cleaved intracellularly to release free cysteine.
Benefits
Glutathione synthesis (primary benefit), CoA production, protein synthesis, detoxification support.
Risks/considerations
Free cysteine is unstable and poorly absorbed as a supplement: use NAC instead. Excess cysteine can be pro-oxidant in some contexts; NAC dosing keeps this self-regulated.
Optimal dosing
N/A (amino acid; obtained via diet and transsulfuration). Supplemental cysteine delivered as NAC (600-1,800 mg/day).
Genetic qualifiers
MTHFR TT: impaired transsulfuration flux reduces endogenous cysteine production, increasing dependence on dietary cysteine and NAC supplementation.
Found in
Meat, poultry, eggs, dairy, legumes. Synthesised endogenously via transsulfuration from homocysteine.
Related
Glutathione · NAC · Transsulfuration Pathway · Homocysteine · CoA

Glycogen

Full name
Glycogen
Type
Carbohydrate storage molecule / energy reserve
What it does
The primary storage form of glucose in animals, stored mainly in the liver (~100g) and skeletal muscle (~400g). Liver glycogen maintains blood glucose between meals and during fasting; muscle glycogen fuels local muscle activity. During fasting, liver glycogen is depleted within approximately 12-16 hours, after which gluconeogenesis sustains blood glucose. Muscle glycogen depletion is a key trigger for fat adaptation and AMPK activation. Replenished during the feeding window via dietary carbohydrates.
Benefits
Rapid energy availability for muscle and brain, blood glucose buffering between meals.
Risks/considerations
High glycogen storage is associated with insulin resistance and reduced fat oxidation. OMAD and fasting protocols deliberately deplete glycogen to drive fat oxidation and AMPK activation.
Optimal dosing
N/A (endogenous storage molecule). Managed via meal timing and fasting duration.
Found in
N/A (produced and stored endogenously in liver and muscle)
Related
Gluconeogenesis · AMPK · Catabolism · OMAD

Homocysteine

Full name
Homocysteine
Type
Amino acid metabolite / cardiovascular risk marker
What it does
An intermediate amino acid produced during methionine metabolism. Elevated homocysteine is a strong independent cardiovascular risk factor and is neurotoxic. The methylation cycle remethylates homocysteine back to methionine (requires B12 + methylfolate); the Transsulfuration transsulfuration pathway converts it to cysteine (requires B6). MTHFR TT impairs remethylation, causing homocysteine accumulation.
Benefits
Homocysteine is the most practical blood readout of methylation status. Keeping homocysteine in range (below 10 micromol/L, ideally 7-8) is a primary goal of methylation support.
Risks/considerations
Elevated homocysteine damages endothelial cells, promotes atherosclerosis, and increases stroke risk. Target: below 10 micromol/L (optimal), ideally 7-8 micromol/L.
Optimal dosing
Managed through adequate methylfolate, B12, B6, and TMG. Lab testing (blood) is the only accurate measure.
Genetic qualifiers
MTHFR TT: the most common genetic cause of mildly elevated homocysteine; carriers benefit most from methylation support (methylfolate, B12, riboflavin, TMG).
Found in
N/A (endogenous metabolite)
Related
Methylation Cycle · Methylfolate · B12 · TMG · Transsulfuration · LDL · HDL · Triglycerides
References
  1. Peng H-Y, et al. Elevated homocysteine levels and risk of cardiovascular and all-cause mortality: a meta-analysis of prospective studies. Journal of Zhejiang University. Science. B. 2015;16(1):78-86. PMID 25559959 (meta-analysis, 12 prospective studies, n=23,623; each 5 μmol/L increment: +52% CHD mortality risk, +32% cardiovascular mortality; top vs bottom category: +66% CHD mortality, +93% all-cause mortality)
  2. Mehlig K, et al. The association between plasma homocysteine and coronary heart disease is modified by the MTHFR 677C>T polymorphism. Heart. 2013;99(23):1761-1765. PMID 24014284 (case-control + meta-analysis, n=1,150 cases / 1,753 controls; tHcy-CHD association confirmed in MTHFR CC and CT carriers; association attenuated in TT homozygotes)

NAD+

Full name
Nicotinamide Adenine Dinucleotide (oxidised form)
Type
Cellular redox coenzyme / sirtuin activator
What it does
A coenzyme present in every living cell, central to energy metabolism (electron carrier in cellular respiration) and as a substrate for sirtuins (longevity proteins), PARP (DNA repair), and CD38. NAD+ levels decline approximately 50% per decade after age 30. NMN and NR are precursors that restore NAD+ levels; Apigeninapigenin preserves them by inhibiting CD38.
Benefits
Energy metabolism, DNA repair, sirtuin activation (longevity signalling), circadian rhythm regulation.
Risks/considerations
NAD+ itself is not orally bioavailable: precursors (NMN, NR) must be used.
Optimal dosing
Managed via NMN or NR supplementation (500-1,000 mg/day), CD38 inhibition via Apigenin, and lifestyle factors (fasting, exercise).
Found in
Produced from dietary niacin (B3), tryptophan, and NMN/NR precursors.
Related
NMN · Sirtuins · Apigenin · AMPK · Neurotransmitter · Niacin · ATP · CD38]]

Nitric Oxide

Full name
Nitric Oxide (NO)
Type
Signalling molecule / vasodilator
What it does
A short-lived gas produced by endothelial nitric oxide synthase (eNOS) from arginine. Causes smooth muscle relaxation in blood vessel walls, producing vasodilation and improved blood flow. Two well-studied pathways: polyphenol-driven eNOS upregulation (endothelin-1 suppression, vasodilation) and UV exposure (dermal NO release from skin nitrite stores: a distinct cardiovascular pathway independent of diet).
Benefits
Cardiovascular health, blood pressure regulation, improved tissue perfusion, athletic performance, erectile function.
Risks/considerations
Simple L-arginine loading is less effective than polyphenol-driven eNOS upregulation for sustained NO production. Piceid resveratrol (Vinia) and similar compounds work via the eNOS/endothelin-1 axis rather than substrate flooding.
Optimal dosing
Managed via dietary nitrates (leafy greens, beets), polyphenols (resveratrol, quercetin), and UVA sun exposure (dermal NO synthesis). Supplement options include piceid resveratrol and beetroot extract.
Found in
N/A (endogenous production from arginine). Dietary nitrates (beetroot, leafy greens) can contribute via alternate pathway.
Related
Resveratrol · Vitamin C

SAMe

Full name
S-Adenosylmethionine
Type
Universal methyl donor / downstream methylation product
What it does
The primary methyl donor in the body, produced from methionine + ATP in the methylation cycle. Donates methyl groups to over 200 substrates including DNA (gene expression), neurotransmitters (serotonin, dopamine, norepinephrine), phospholipids (phosphatidylcholine via PEMT), creatine (endogenous synthesis), and L-carnitine. Reduced MTHFR activity (as in MTHFR TT variants) limits SAMe production: the impaired cycle produces less SAMe, creating downstream deficits in all methylation-dependent processes.
Benefits
Mood (antidepressant effects at therapeutic doses), joint health, liver health, methylation of all downstream substrates.
Risks/considerations
Direct SAMe supplementation is an option but expensive and unstable. The alternative is to optimise the upstream cycle inputs (methylfolate, B12, TMG) to increase endogenous SAMe production rather than supplement directly.
Optimal dosing
Endogenous. Supported through adequate methylation cycle inputs rather than direct supplementation.
Genetic qualifiers
MTHFR TT: impaired SAMe production is the downstream consequence of reduced MTHFR activity; adequate methylfolate, B12 and TMG support what capacity remains.
Found in
N/A (endogenous product)
Related
Methylation Cycle · TMG · Methylfolate · Homocysteine · Phosphatidylcholine
References
  1. Papakostas GI, Cassiello CF, Iovieno N. Folates and S-adenosylmethionine for major depressive disorder. Can J Psychiatry. 2012;57(7):406-13. PMID 22762295 (review; SAMe efficacious and well-tolerated for reducing depressive symptoms; proposed mechanism: methylation of neurotransmitter biosynthesis pathways)
  2. Najm WI, et al. S-adenosyl methionine (SAMe) versus celecoxib for the treatment of osteoarthritis symptoms: a double-blind cross-over trial. BMC Musculoskelet Disord. 2004;5:6. PMID 15102339 (RCT, n=56; SAMe 1,200 mg/day equivalent to celecoxib 200 mg/day for knee OA pain reduction after two months; slower onset but comparable efficacy)

TMAO (Trimethylamine N-Oxide)

Full name
Trimethylamine N-Oxide (TMAO)
Type
Gut metabolite / cardiovascular risk marker
What it does
A metabolite produced when gut bacteria metabolise choline, betaine, carnitine, and lecithin. Gut bacteria first convert these substrates to TMA (trimethylamine), which is then oxidised to TMAO in the liver by FMO3 enzyme. Elevated plasma TMAO is associated with increased cardiovascular risk: it promotes foam cell formation, platelet aggregation, and atherosclerosis. The relationship is not simply "more choline = more TMAO"; microbiome composition is the primary determinant. Omnivores produce more TMAO from carnitine than long-term vegetarians because meat-eating selects for TMAO-producing bacteria. L. Reuteri supplementation may reduce TMAO production by competing with TMAO-producing bacteria.
Benefits
N/A (TMAO is a risk marker, not a beneficial compound). Understanding TMAO informs supplementation strategy: specifically, the rationale for pairing high choline and carnitine protocols with L. Reuteri and dietary fibre to maintain a microbiome that minimises TMAO production.
Risks/considerations
Cardiovascular risk at elevated plasma levels: highest TMAO quartile associated with HR 2.54 for major adverse cardiovascular events in a prospective cohort of 4,007 patients (Tang 2013, NEJM). Risk is highly dependent on microbiome composition, not just substrate intake. High choline and carnitine supplementation without supporting gut health creates theoretical TMAO risk. Mediterranean-style dietary patterns and fermented foods associate with lower TMAO production from equivalent substrate loads.
Optimal dosing
N/A (minimise via gut microbiome support). Mitigated by L. Reuteri, dietary fibre, polyphenols, and Mediterranean-style eating patterns.
Found in
Produced endogenously via gut bacterial metabolism of choline, betaine, carnitine, and lecithin. Also present in fish (particularly cold-water species): dietary TMAO from fish is largely excreted rather than retained.
Related
Choline · Lead · L-Carnitine · L. Reuteri · TMG · LDL · HDL · Triglycerides
References
  1. Tang WH, et al. Intestinal microbial metabolism of phosphatidylcholine and cardiovascular risk. New England Journal of Medicine. 2013;368(17):1575-1584. PMID 23614584 (prospective cohort, n=4,007; highest vs lowest plasma TMAO quartile: HR 2.54 for MACE at 3 years; TMAO production gut-microbiota-dependent; suppressed by antibiotics)
  2. Chen G, et al. Association of trimethylamine-N-oxide levels with risk of cardiovascular disease and mortality among elderly subjects: a systematic review and meta-analysis. Cardiorenal Medicine. 2021;12(2):39-54. PMID 34915483 (27 prospective cohort studies; high TMAO: HR 1.038 for adverse cardiovascular events, HR 1.38 for all-cause mortality; association persists in CKD and heart failure subgroups)
  3. Han J-M, et al. Relationship between trimethylamine N-oxide and the risk of hypertension in patients with cardiovascular disease: a meta-analysis and dose-response relationship analysis. Medicine (Baltimore). 2024;103(1):e36784. PMID 38181288 (15 prospective cohort studies, n=15,498; linear dose-response: hypertension risk increases 1.014% per 1 μmol/L increment in circulating TMAO)

Troponin

Full name
Troponin (cardiac and skeletal muscle protein complex)
Type
Structural protein / cardiac biomarker
What it does
A regulatory protein complex in muscle fibres that controls calcium-mediated muscle contraction. Troponin I, T, and C work together to allow or block actin-myosin interaction depending on calcium availability. Cardiac troponin (cTnI and cTnT) is released into the bloodstream when heart muscle is damaged, making it the primary biomarker for myocardial infarction and cardiac injury. Relevant to supplement users specifically because high-dose Biotin interferes with troponin immunoassays, causing falsely low cardiac troponin readings: a dangerous lab artefact if cardiac injury is suspected.
Benefits
N/A (structural protein). Understanding troponin's role as a cardiac biomarker is the relevant context here.
Risks/considerations
High-dose Biotin (>5 mg/day) can cause false-negative troponin results in immunoassay-based lab tests due to biotin-streptavidin assay interference. Must disclose biotin supplementation before any cardiac workup or emergency assessment. Low supplemental biotin doses (micrograms rather than milligrams) are unlikely to interfere but are worth disclosing as a precaution.
Optimal dosing
N/A (endogenous protein)
Found in
Cardiac and skeletal muscle tissue
Related
Biotin

The BioForge Glossary · 3 entries

Pharmaceuticals and Research Compounds

Prescription drugs and clinically studied compounds referenced for mechanistic context.

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Metformin

Full name
Metformin (biguanide)
Type
Pharmaceutical / AMPK activator / insulin sensitizer
What it does
The most widely prescribed diabetes medication, primarily working by activating AMPK via inhibition of mitochondrial complex I. This reduces hepatic glucose production and improves insulin sensitivity. Metformin is notable in longevity research for effects that overlap significantly with fasting and caloric restriction: it mimics some metabolic benefits of OMAD pharmacologically. The TAME trial (Targeting Aging with Metformin) is investigating it as a formal longevity intervention.
Benefits
Insulin sensitization, AMPK activation, reduced hepatic glucose output, potential longevity effects via mTOR suppression and autophagy induction. Studied as a cancer risk reducer.
Risks/considerations
Berberine, R-ALA, and OMAD provide overlapping AMPK activation without pharmaceutical intervention. Long-term metformin use may impair exercise adaptation and reduce mitochondrial biogenesis response to training. Can deplete B12 with long-term use: monitor levels. Requires prescription.
Optimal dosing
Prescription only. Standard pharmaceutical dose 500-2,000 mg/day with meals.
Genetic qualifiers
TCF7L2 TT: the primary T2D risk variant for which metformin is most studied and for which benefit is most robustly evidenced. Carriers have 2x elevated T2D risk and represent the population for whom metformin prophylaxis has the strongest pharmacogenomic rationale.
Found in
Pharmaceutical only (derived from French lilac / Galega officinalis).
Related
AMPK · Hypothalamus · Berberine · Chelation · R-ALA · mTOR · Autophagy · Mitochondrial Biogenesis · OMAD

Rapamycin

Full name
Rapamycin (Sirolimus)
Type
Pharmaceutical / mTOR inhibitor / longevity compound
What it does
A macrolide compound originally developed as an immunosuppressant that directly inhibits mTORC1, suppressing cell growth and proliferation signals and inducing autophagy. One of the most studied longevity compounds: the only drug shown to extend lifespan in multiple mammalian species including mice. Works by binding to FKBP12, which then inhibits mTORC1 activity. Intermittent low-dose protocols (weekly dosing) are being studied to capture longevity benefits while minimising immunosuppression.
Benefits
Autophagy induction, mTOR suppression, extended lifespan in animal models, potential cancer risk reduction, cellular senescence modulation.
Risks/considerations
At immunosuppressive doses: infection risk, impaired wound healing, metabolic side effects. Intermittent low-dose longevity protocols (e.g., 5 mg weekly) show a more favourable risk profile but remain experimental. May impair muscle protein synthesis at higher doses via mTORC1 suppression. Requires prescription.
Optimal dosing
Prescription only. Longevity research protocols typically use 1-5 mg weekly (intermittent), not daily immunosuppressive doses.
Found in
Pharmaceutical only (originally isolated from Streptomyces hygroscopicus bacteria on Easter Island / Rapa Nui: hence the name).
Related
mTOR · Autophagy · AMPK · Sirtuins

Warfarin

Full name
Warfarin (Coumadin)
Type
Pharmaceutical drug / Vitamin K antagonist anticoagulant
What it does
Anticoagulant medication that inhibits the VKORC1 enzyme (Vitamin K epoxide reductase), blocking Vitamin K recycling and thereby reducing the synthesis of clotting factors II, VII, IX, and X. Used therapeutically to prevent blood clots in atrial fibrillation, deep vein thrombosis, pulmonary embolism, and prosthetic heart valves. Warfarin's anticoagulant effect is directly modulated by Vitamin K intake: increases in Vitamin K1 or K2 reduce its effect; decreases raise bleeding risk. INR monitoring is used to maintain therapeutic range.
Benefits
N/A (pharmaceutical intervention; not a supplement).
Risks/considerations
CRITICAL DRUG INTERACTION: all forms of Vitamin K (K1, MK-4, MK-7) directly antagonise warfarin's anticoagulant effect. Consistent, stable Vitamin K intake can be managed on warfarin with physician-guided INR monitoring; erratic supplementation cannot. Anyone taking warfarin must not start, stop, or significantly change Vitamin K supplementation without physician supervision. Nattokinase is also contraindicated with warfarin due to additive anticoagulant effects. Warfarin directly inhibits K2-dependent carboxylation, leaving MGP and osteocalcin inactive: prolonged use is associated with vascular calcification.
Optimal dosing
N/A (physician-managed; dose individualised to INR target). Self-adjustment is contraindicated.
Genetic qualifiers
VKORC1 rs9923231 T;T: significantly reduced warfarin dose requirement due to impaired Vitamin K recycling: standard doses can produce supratherapeutic anticoagulation; always disclose this variant to prescribing physicians. CYP2C9 2 and 3 alleles: reduced warfarin metabolism increases bleeding risk at standard doses; both variants are included in standard pharmacogenomic warfarin dosing algorithms.
Found in
Prescription pharmaceutical only.
Related
Vitamin K1 · Vitamin K2 MK-4 · Vitamin K2 MK-7 · MGP · Nattokinase

The BioForge Glossary · 37 entries

Supplements and Compounds

Active compounds in the longevity and optimisation stack: polyphenols, fatty acids, amino acids, probiotics, and more.

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Apigenin

Full name
Apigenin (4',5,7-trihydroxyflavone)
Type
Flavonoid / CD38 inhibitor
What it does
Inhibits CD38, an enzyme that consumes NAD+.1 By reducing CD38 activity, apigenin preserves cellular NAD+ levels, potentiating the effects of NMN supplementation. Also has mild anxiolytic and sleep-promoting effects via GABA-A modulation.2
Benefits
NAD+ preservation, sleep quality support, mild anti-inflammatory, potential neuroprotection.2
Risks/considerations
Mild blood thinning at high doses. Well tolerated at standard doses.
Optimal dosing
50-100 mg/day. Taken at bedtime to pair sleep-promoting effect with NAD+ preservation overnight.
Found in
Parsley, chamomile tea, celery, artichokes.
Related
NAD+ · NMN · Sirtuins · CD38 · GABA-A Receptor · Flavonoid · Polyphenol
References
  1. Escande C, et al. Flavonoid apigenin is an inhibitor of the NAD+ase CD38: implications for cellular NAD+ metabolism, protein acetylation, and treatment of metabolic syndrome. Diabetes. 2013;62(4):1084-93. PMID 23172919 | PMC Full Text
  2. Kramer DJ, Johnson AA. Apigenin: a natural molecule at the intersection of sleep and aging. Frontiers in Nutrition. 2024;11:1359176. PMID 38476603 | PMC Full Text

Berberine

Full name
Berberine (isoquinoline alkaloid)
Type
Polyphenol / AMPK activator / Phase II inducer
What it does
Activates AMPK, improving insulin sensitivity and glucose metabolism.1 Also a Phase II detoxification inducer via Nrf2 pathway.2 Lowers LDL and total cholesterol as a standalone agent, confirmed across randomized trials.3
Benefits
Insulin sensitization, liver support, mild antimicrobial, LDL/cholesterol reduction.1,3
Risks/considerations
Can lower blood pressure and blood glucose: caution stacking with other hypoglycemics. Extended fasting already provides significant insulin sensitization; berberine's added glucose-lowering effect is a genuine consideration inside extended fasting windows, worth monitoring for hypoglycemia symptoms. Weak CYP3A4/CYP2D6 inhibitor: caution with drugs metabolized through these pathways.4
Optimal dosing
125-500 mg with meals.
Genetic qualifiers
TCF7L2 TT: the T2D risk variant makes AMPK activation and insulin sensitization particularly relevant.
Found in
Barberry, goldenseal, Oregon grape.
Related
AMPK · Phase II Detox · Nrf2 · Milk Thistle · LDL · Cholesterol
References
  1. Shrivastava S, et al. Addressing the preventive and therapeutic perspective of berberine against diabetes. Heliyon. 2023;9(11):e21233. PMID 38027723 | PMC Full Text
  2. Cheng J, et al. Berberine alleviates fructose-induced hepatic injury via ADK/AMPK/Nrf2 pathway. Biomedicine & Pharmacotherapy. 2024;179:117361. PMID 39243432 (animal study)
  3. Guo J, et al. Effect of berberine on lipid profile in patients with hyperlipidemia: a meta-analysis. Evidence-Based Complementary and Alternative Medicine. 2021;2021:2074610. DOI 10.1155/2021/2074610
  4. Hermann R, von Richter O. Clinical evidence of herbal drugs as perpetrators of pharmacokinetic drug interactions. Planta Medica. 2012;78(13):1458-77. DOI 10.1055/s-0032-1315117

Betaine HCl

Full name
Betaine Hydrochloride
Type
Digestive acid supplement
What it does
Acidifies the stomach to support protein digestion, particularly in people with low stomach acid (hypochlorhydria). Also provides betaine, which has minor methyl donor activity. Present in digestive enzyme formula.
Benefits
Improved protein digestion and amino acid absorption, reduced bloating from protein maldigestion, modest methyl donor contribution.
Risks/considerations
Not appropriate if ulcers or gastritis present. Can cause heartburn at high doses.
Optimal dosing
120-500 mg with protein-containing meals.
Found in
Beets (as betaine, not HCl form).
Related
Transcription Factor · TMG · Digestive Enzymes · LDL
References
  1. Yago MR, et al. Gastric reacidification with betaine HCl in healthy volunteers with rabeprazole-induced hypochlorhydria. Molecular Pharmaceutics. 2013;10(11):4032-7. PMID 23980906 | PMC Full Text
  2. Mentch SJ, Locasale JW. One-carbon metabolism and epigenetics. Nutrients. 2017;9(5):445. PMID 28468239 | PMC Full Text

Butyrate / Sodium Butyrate

Full name
Sodium Butyrate (short-chain fatty acid salt)
Type
Short-chain fatty acid / HDAC inhibitor
What it does
Short-chain fatty acid that is the primary fuel source for colonocytes (colon cells).1 Inhibits histone deacetylases (HDACs), modulating gene expression toward anti-inflammatory and anti-cancer profiles.2 Supports gut barrier integrity and tight junction maintenance.3
Benefits
Gut epithelial health, reduced intestinal permeability, anti-inflammatory, epigenetic regulation, colon cancer risk reduction, microbiome support.2
Risks/considerations
Odour (butyric acid smell) is noticeable. Some people experience initial GI adjustment. Works synergistically with L. Reuteri.
Optimal dosing
600-1,200 mg/day. Take at bedtime; enteric-coated or butyric acid salt forms preferred for delivery past the stomach. (Note: specific dose range derives from clinical practice and small trials; no landmark dose-ranging RCT confirmed.)
Found in
Produced by gut bacteria fermenting dietary fibre. Small amounts in butter, ghee.
Related
HDAC · L. Reuteri · Glutathione
References
  1. Donohoe DR, et al. The microbiome and butyrate regulate energy metabolism and autophagy in the colonic epithelium. Cell Metabolism. 2011;13(5):517-26. PMID 21531334 | PMC Full Text (animal study)
  2. Liu H, et al. Butyrate: A Double-Edged Sword for Health? Advances in Nutrition. 2018;9(1):21-29. PMID 29438462 | PMC Full Text
  3. Peng L, et al. Butyrate enhances the intestinal barrier by facilitating tight junction assembly via activation of AMP-kinase in Caco-2 cell monolayers. Journal of Nutrition. 2009;139(9):1619-25. PMID 19625695 | PMC Full Text (cell study)

C15:0 (Pentadecanoic Acid)

Full name
Pentadecanoic Acid (C15:0)
Type
Odd-chain saturated fatty acid / first newly identified essential fatty acid in 90 years
What it does
Addresses Cellular Fragility Syndrome: cell membranes become too fluid with age due to excess C16:0 linoleic acid displacement. C15:0 restores membrane rigidity, preventing ferroptosis (iron-mediated lipid peroxidation chain reaction causing catastrophic cell death).1,2 Also a PPARα/δ agonist (fat burning, mitochondrial biogenesis), AMPK activator, and mild senolytic.1
Benefits
Cell membrane integrity, mitochondrial health, fat oxidation, anti-aging, mild senolytic activity. Synergizes with Urolithin A (both target mitochondrial health via different mechanisms), NMN (energy metabolism), and OMAD (fasting-induced autophagy). In randomized controlled trials, C15:0 supplementation reduced LDL-cholesterol and supported beneficial gut microbiome shifts,3 and at therapeutic circulating levels improved liver enzymes (ALT, AST) and hemoglobin.4 In a meta-analysis of 18 cohort studies, higher circulating C15:0 was associated with 12% lower CVD risk.5 Gut bacteria (L. Reuteri family) also synthesise C15:0 endogenously from dietary fibre, providing a gut microbiome-derived supply route independent of dairy intake.6
Risks/considerations
Well tolerated. Trace amounts in some dairy; difficult to reach therapeutic levels through diet alone.
Optimal dosing
100-200 mg/day.
Found in
Small amounts in whole-fat dairy from ruminants, some fish.
Related
Ferroptosis · AMPK · Polyphenol · Postbiotic · PPAR · Short-Chain Fatty Acid · Senolytic · Urolithin A · Mitochondrial Biogenesis · LDL · HDL
References
  1. Venn-Watson S, Lumpkin R, Dennis EA. Efficacy of dietary odd-chain saturated fatty acid pentadecanoic acid parallels broad associated health benefits in humans: could it be essential? Scientific Reports. 2020;10(1):8161. PMID 32424181 | PMC Full Text (animal and cell study; COI: corresponding author is co-founder of Seraphina Therapeutics (C15:0 supplement))
  2. Venn-Watson S. The Cellular Stability Hypothesis: Evidence of Ferroptosis and Accelerated Aging-Associated Diseases as Newly Identified Nutritional Pentadecanoic Acid (C15:0) Deficiency Syndrome. Metabolites. 2024;14(7):355. PMID 39057678 | PMC Full Text (review; COI: author is co-founder of Seraphina Therapeutics (C15:0 supplement))
  3. Chooi YC, et al. Effect of an Asian-adapted Mediterranean diet and pentadecanoic acid on fatty liver disease: the TANGO randomized controlled trial. American Journal of Clinical Nutrition. 2023;119(3):788-799. PMID 38035997 (RCT; independent authors at Singapore ASTAR / NUS; no C15:0 supplement company COI) (abstract only)*
  4. Robinson MK, Lee E, Ugalde-Nicalo PA, et al. Pentadecanoic Acid Supplementation in Young Adults with Overweight and Obesity: A Randomized Controlled Trial. Journal of Nutrition. 2024;154(9):2763-2771. PMID 39069269 | PMC Full Text (RCT; UCSD/NIH-funded; no C15:0 supplement company COI; n=30, subgroup analysis)
  5. Trieu K, Bhat S, Dai Z, et al. Biomarkers of dairy fat intake, incident cardiovascular disease, and all-cause mortality: A cohort study, systematic review, and meta-analysis. PLoS Medicine. 2021;18(9):e1003763. PMID 34547017 | PMC Full Text (meta-analysis of 18 cohort studies; George Institute / Harvard / Karolinska; no C15:0 supplement company COI)
  6. Wei W, Wong CC, Jia Z, et al. Parabacteroides distasonis uses dietary inulin to suppress NASH via its metabolite pentadecanoic acid. Nature Microbiology. 2023;8(8):1534-1548. PMID 37386075 | PMC Full Text (mechanistic mouse study; Chinese University of Hong Kong; no C15:0 supplement company COI)

Choline

Full name
Choline (essential nutrient)
Type
Methyl donor / phospholipid precursor
What it does
Precursor to acetylcholine (neurotransmitter) and phosphatidylcholine (cell membrane component).1 Methyl donor supporting the methylation cycle. Critical for liver fat metabolism, preventing non-alcoholic fatty liver.2
Benefits
Cognitive function (acetylcholine), cell membrane integrity, liver health, methylation support, REM sleep quality.1,2
Risks/considerations
PEMT CT variant reduces endogenous phosphatidylcholine synthesis: increases dietary/supplemental choline requirement.2 Choline converts to TMAO in the gut via bacterial metabolism; L. Reuteri may mitigate this.3 Very high doses can produce fishy body odour.
Optimal dosing
500-1,000 mg/day from supplements plus dietary sources. Total intake including food should target 550 mg/day (adequate intake) to 1,000 mg/day for cognitive and methylation support.2
Genetic qualifiers
PEMT CT: reduced phosphatidylcholine synthesis makes dietary and supplemental choline more important than average.
Found in
Eggs (especially yolk: richest common food source), liver, salmon, beef.
Related
Methylation Cycle · Inositol · Phosphatidylcholine · TMG
References
  1. Burns BC, et al. Choline: An Essential Nutrient with Health Benefits and a Signaling Molecule. International Journal of Molecular Sciences. 2025;26(15):7159. PMID 40806292 | PMC Full Text
  2. Wallace TC, et al. Choline: The Underconsumed and Underappreciated Essential Nutrient. Nutrition Today. 2018;53(6):240-253. PMID 30853718 | PMC Full Text
  3. Zeisel SH, Warrier M. Trimethylamine N-Oxide, the Microbiome, and Heart and Kidney Disease. Annual Review of Nutrition. 2017;37:157-181. PMID 28715991 | [Abstract only]

CLA (Conjugated Linoleic Acid)

Full name
Conjugated Linoleic Acid (CLA)
Type
Naturally occurring fatty acid / body composition compound
What it does
A group of positional and geometric isomers of linoleic acid found primarily in dairy and meat from ruminant animals. Grass-fed sources have significantly higher CLA content than grain-fed equivalents. CLA acts on PPAR receptors to promote fat oxidation and lean mass retention, modulates immune function, and has demonstrated anti-cancer properties in animal models. The c9,t11 isomer (rumenic acid) is the predominant and most studied form in grass-fed dairy. Present in ghee as a natural constituent of grass-fed butterfat.
Benefits
Body composition support (fat oxidation, lean mass retention), anti-inflammatory, immune modulation, potential anti-cancer properties. Qualitatively different from industrially produced CLA supplements, which are typically high in the t10,c12 isomer that has less favourable metabolic effects.
Risks/considerations
Food-source CLA (grass-fed dairy, ghee) is well-tolerated. Supplemental CLA (t10,c12-dominant) at high doses may cause insulin resistance and increase inflammatory markers: distinct from dietary CLA.
Optimal dosing
Dietary. Best obtained from grass-fed dairy and ruminant meat. Supplemental CLA (t10,c12-dominant) is not recommended: food sources provide the beneficial c9,t11 isomer.
Found in
Grass-fed dairy (butter, ghee, cheese), grass-fed beef. Significantly lower in grain-fed equivalents.
Related
Ghee · C15:0 · PPAR · Krill Oil / Omega-3

Collagen Peptides

Full name
Hydrolyzed Collagen Peptides (Type I & III)
Type
Structural protein supplement
What it does
Provides pre-digested collagen amino acids (glycine, proline, hydroxyproline) that support connective tissue synthesis. Type I and III are the primary collagen types in skin, tendons, ligaments, and bone. Glycine also contributes to glutathione synthesis. At approximately one-third of collagen's amino acid content by weight, glycine additionally supports intestinal barrier function by promoting GLP-2 secretion from enteroendocrine L cells; GLP-2 signals through IGF-1 to upregulate tight junction protein expression in enterocytes, preserving absorptive surface integrity and improving amino acid uptake efficiency.
Benefits
Joint health, tendon/ligament integrity, skin elasticity, gut lining support, glycine contribution to glutathione.
Risks/considerations
Requires Vitamin C co-administration for hydroxylation (prolyl hydroxylase is Vitamin C-dependent).
Optimal dosing
9-15 g/day, taken with Vitamin C to support hydroxylation. Distribute across the day for sustained synthesis stimulus.
Genetic qualifiers
COL5A1 TT: increased Achilles tendinopathy risk elevates importance of connective tissue support.
Found in
Bone broth, skin-on animal products.
References
  1. McCarty & Lerner 2021: review (Adv Nutr); glycine and glutamine promote GLP-2 secretion from intestinal L cells, which drives tight junction formation via PI3K/Akt/mTORC1 in enterocytes; confirms glycine as a nutraceutical supporting intestinal barrier function and absorption efficiency. PMID 33126251 | DOI
  2. Sivaraman & Shanthi 2022: collagen hydrolysate from fish skin reduced paracellular permeability in TNF-alpha treated Caco-2 cells and improved clinical signs of DSS colitis in mice; enhanced occludin, ZO-1, and claudin tight junction protein expression; confirms collagen peptides directly support intestinal epithelial barrier. PMID 36116587 | DOI
  3. Wang et al. 2025: RCT (n=77, double-blind, 5,000 mg/day bioactive collagen peptides for 12 weeks); significantly improved dermal density, skin hydration, transepidermal water loss, and firmness vs placebo; effects maintained through 4-week washout period. PMID 41311286 | DOI
Related
Vitamin C · Glycine · Hydroxylation · Glutathione · Transsulfuration · Enterocyte

CoQ10 / Ubiquinol

Full name
Coenzyme Q10 (Ubiquinol = reduced form)
Type
Mitochondrial electron carrier / antioxidant
What it does
Essential component of the mitochondrial electron transport chain (Complex I-III), directly involved in ATP production. Also acts as a fat-soluble antioxidant protecting cell membranes from oxidative damage. Ubiquinol is the reduced (active) form; more bioavailable than ubiquinone, especially in older individuals whose conversion efficiency declines.
Benefits
Mitochondrial energy production, antioxidant protection, cardiovascular health, statin side effect mitigation (statins deplete CoQ10).
Risks/considerations
Fat-soluble; take with fat-containing meal for absorption. Ubiquinol superior to ubiquinone for those over 40.
Optimal dosing
100-300 mg ubiquinol/day with a fat-containing meal. Ubiquinol form strongly preferred over ubiquinone for those over 40 due to superior bioavailability.
Found in
Organ meats (heart highest), beef, sardines, peanuts. Declines significantly with age.
Related
ATP · Mitochondrial Biogenesis · PQQ · Enzyme · Epigenetic · Eannatto

Creatine

Full name
Creatine Monohydrate
Type
Energy buffer / neuroprotective compound
What it does
Replenishes ATP via the phosphocreatine system in muscle and brain, buffering energy availability during short-duration high-intensity efforts. At higher doses (15-20 g/day), shown to enhance cognitive performance and neuroprotection, particularly in older individuals.
Benefits
Muscle strength and power, cognitive enhancement (at higher doses), neuroprotection, hydration within muscle cells, potential satellite cell activation.
Risks/considerations
Causes water retention in muscle (increases scale weight by ~1-2 kg; not fat). Requires adequate hydration. GI upset if taken in large single doses: split across the day. Well tolerated at 20 g/day when distributed.
Optimal dosing
3-5 g/day for standard muscle and performance benefits. 10-20 g/day studied for neuroprotective effects in older individuals; higher doses well tolerated but ensure adequate hydration.
Found in
Red meat, fish. Endogenous synthesis from glycine, arginine, methionine.
Related
ATP · Methylation Cycle

Curcumin / Turmeric

Full name
Curcumin (primary polyphenol in turmeric)
Type
Polyphenol / anti-inflammatory / Nrf2 activator
What it does
Inhibits NF-kB (master inflammatory transcription factor), activates Nrf2 (antioxidant gene expression), inhibits COX-2 (prostaglandin synthesis). Poor bioavailability in standard form; piperine (BioPerine) increases absorption approximately 20x by inhibiting CYP3A4-mediated metabolism.
Benefits
Systemic anti-inflammatory, antioxidant, joint health, neuroprotection, potential anti-cancer properties.
Risks/considerations
Piperine increases bioavailability of many other compounds and drugs; relevant if pharmaceutical interactions are a concern. Fat-soluble; take with a fatty meal for additional absorption.
Optimal dosing
500-1,000 mg turmeric extract standardised to 95% curcuminoids, with piperine (BioPerine) to enhance absorption approximately 20x.
Found in
Turmeric root (2-5% curcumin by weight).
Related
Phase II Detox · Glutathione

Digestive Enzymes

Full name
Broad-spectrum digestive enzyme complex
Type
Digestive support supplement
What it does
Supplements endogenous digestive enzyme production to improve breakdown and absorption of proteins (Betaine HCl, pepsin, L-glutamic acid HCl), fats (ox bile, pancreatin), and carbohydrates (pancreatin). Particularly relevant with OMAD given the concentrated single-meal protein and fat load.
Benefits
Improved nutrient absorption, reduced digestive burden, reduced bloating/gas from incomplete digestion, supports assimilation of the full supplement stack.
Risks/considerations
Betaine HCl component: not appropriate with ulcers. Pancreatin is porcine-derived.
Optimal dosing
1-2 caps per main meal, taken at the start of the meal.
Found in
N/A (supplemental)
Related
Betaine HCl · OMAD · EAAs · Coenzyme · Collagen Peptides

EAAs / Essential Amino Acids

Full name
Essential Amino Acids (EAAs)
Type
Protein building blocks / anabolic trigger
What it does
The 9 amino acids the body cannot synthesise and must obtain from diet: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine. Leucine is the primary mTOR activator triggering muscle protein synthesis. A quality EAA formula provides all 9 in ratios optimised for utilisation.
Benefits
Muscle protein synthesis, mTOR activation, recovery support, low caloric load (minimal fast-breaking impact).
Risks/considerations
Methionine contributes to homocysteine load, which adequate methylation cofactors (B12, methylfolate, TMG) clear. BCAAs alone (leucine, isoleucine, valine) are insufficient without full EAA spectrum.
Optimal dosing
5-10 g EAAs per serving, 1-3 times daily depending on protein intake and training demands. Higher frequency useful during extended fasting protocols to preserve lean mass.
Genetic qualifiers
MTHFR TT: methionine in EAAs feeds the homocysteine pathway; adequate B12/folate/TMG handles remethylation.
Found in
All complete animal proteins. Plant proteins typically incomplete.
Related
mTOR · Methylation Cycle · Homocysteine · Collagen Peptides

Eannatto / Tocotrienols

Full name
Tocotrienols (annatto-derived, delta-tocotrienol-rich fraction) + trans-Geranylgeraniol (GG)
Type
Vitamin E isomers (tocopherol-free) / GG precursor
What it does
Tocotrienols are the superior Vitamin E fraction for metabolic and cardiovascular health. Tocopherol-free formulation is critical: tocopherols compete with and block tocotrienol absorption. The annatto-derived form has the highest delta-tocotrienol content. GG (Geranylgeraniol (GG)geranylgeraniol) is a precursor to CoQ10, Vitamin K2 MK-4, and dolichol; supplementing GG supports the pool depleted by statins and aging.
Benefits
Cardiovascular protection, anti-inflammatory, cancer risk reduction (delta tocotrienols most potent), telomere protection, GG pool replenishment supporting CoQ10 and K2 MK-4 synthesis.
Risks/considerations
Must be taken with food for fat-soluble absorption. Avoid taking on an empty stomach. Do not use standard Vitamin E supplements containing tocopherols alongside: tocopherols compete with and block tocotrienol absorption.
Optimal dosing
150-300 mg tocotrienols/day (delta and gamma, tocopherol-free) with a fat-containing meal. RCT evidence: 300 mg delta-tocotrienol twice daily (600 mg/day total) reduced hepatic inflammation and oxidative stress markers in NAFLD (Pervez 2018); 180 mg TRF/day improved lipid profiles in hemodialysis patients (Daud 2013). The 150-300 mg range is a reasonable health-optimization target in non-disease populations, below the higher clinical trial doses. GG component (if present in formulation): 150+ mg/day supports downstream K2 MK-4 and CoQ10 synthesis.
Found in
Annatto seeds (highest known source of tocotrienols), red palm oil, rice bran oil.
Related
Cholesterol · LDL · CoQ10 · Vitamin K2 MK-4 · GG · Telomeres
References
  1. Pervez MA, et al. Effects of delta-tocotrienol supplementation on liver enzymes, inflammation, oxidative stress and hepatic steatosis in patients with nonalcoholic fatty liver disease. Turk J Gastroenterol. 2018;29(2):170-176. PMID 29749323 (RCT, n=71; 300 mg delta-tocotrienol twice daily (600 mg/day) for 12 weeks; significantly reduced ALT, AST, hs-CRP, and MDA in NAFLD; no adverse effects reported)
  2. Daud ZA, et al. Vitamin E tocotrienol supplementation improves lipid profiles in chronic hemodialysis patients. Vasc Health Risk Manag. 2013;9:747-61. PMID 24348043 (RCT, n=81; 180 mg TRF tocotrienols/day for 16 weeks; significantly improved triglycerides and HDL-cholesterol at 12 and 16 weeks vs placebo)

Fadogia Agrestis

Full name
Fadogia Agrestis (West African herb)
Type
Herbal adaptogen / LH stimulant
What it does
Proposed mechanism is stimulation of luteinising hormone (LH) release, which signals the testes to produce testosterone. Less well-studied than Tongkat Ali. Often cycled with Tongkat Ali on the theory that cycling prevents receptor downregulation (conventional practice; RCT confirmation absent).
Benefits
Potential testosterone support, often cycled with Tongkat Ali.
Risks/considerations
Limited long-term human safety data. Some animal studies show testicular toxicity at very high doses: standard supplemental doses (600 mg) are well below concerning thresholds. Cycle to avoid desensitisation.
Optimal dosing
Human dose-response data limited. Common supplementation range: 600 mg/day, usually cycled with Tongkat Ali (conventional practice; RCT confirmation absent).
Found in
Native to West Africa (herbal extract).
Related
Tongkat Ali

Fisetin

Full name
Fisetin (3,3',4',7-tetrahydroxyflavone)
Type
Flavonoid / senolytic / antioxidant
What it does
The most potent natural senolytic identified to date. At high pulse doses (~20 mg/kg), fisetin selectively induces apoptosis in senescent cells by inhibiting pro-survival pathways (PI3K/AKT, BCL-2 family) that senescent cells depend on. Also inhibits mTOR, activates Sirtuins, and has significant antioxidant and anti-inflammatory properties. At maintenance doses (100-200 mg/day), senolytic activity is minimal: the clearance mechanism requires the concentration achieved by pulse dosing to be meaningful.
Benefits
Senescent cell clearance (pulse dosing), anti-inflammatory, antioxidant, mTOR inhibition, Sirtuin activation, potential neuroprotection, memory support (BDNF upregulation).
Risks/considerations
Daily low-dose supplementation does not meaningfully clear senescent cells: the concentration required for apoptosis induction is not reached. Pulse dosing (2-3 consecutive days at ~20 mg/kg) is the evidence-supported approach, repeated every 2-3 months. May transiently impair wound healing immediately post-dose as some tissue-maintenance senescent cells are cleared alongside pathological ones.
Optimal dosing
Senolytic pulse: ~20 mg/kg body weight for 2-3 consecutive days every 2-3 months. General antioxidant/maintenance: 100-200 mg/day (insufficient for meaningful senolysis but provides antioxidant benefit). Do not rely on daily low doses for senolytic effect.
Found in
Strawberries, apples, persimmons, onions, cucumbers (in small amounts insufficient for senolytic effect: supplementation required for pulse protocols).
Related
Senolytic · mTOR · Sirtuins · Autophagy

Geranylgeraniol (GG)

Full name
trans-Geranylgeraniol
Type
Isoprenoid / biosynthetic precursor
What it does
A 20-carbon isoprenoid that serves as the direct precursor to Vitamin K2 MK-4 (in tissue), CoQ10 (in mitochondria), and dolichol (protein glycosylation). The mevalonate pathway (same pathway statins inhibit) produces GG; statin use and aging deplete GG pools. Supplementing GG restores these downstream products.
Benefits
K2 MK-4 synthesis support, CoQ10 replenishment, protein glycosylation support, statin side effect mitigation.
Risks/considerations
Well tolerated. Most relevant for those on statins or those showing signs of K2 or CoQ10 depletion. Not on statins but aging-related GG depletion makes supplementation relevant.
Optimal dosing
150-300 mg/day with a fat-containing meal. The only human RCT to date (Jurgelewicz 2026, n=34, 18-week crossover) used 300 mg/day and found CoQ10 maintained during GG supplementation (vs significant decline during placebo), plus significant testosterone increase in men with baseline < 600 ng/dL (Cohen's d=1.13). Commercial annatto-derived formulations typically contain 150 mg GG per serving. Clinical data at 75-150 mg/day is not yet available from controlled trials.
Found in
Trace amounts in annatto, plants.
Related
Vitamin K2 MK-4 · CoQ10 · Eannatto
References
  1. Jurgelewicz M, et al. The effects of geranylgeraniol supplementation on testosterone in middle-aged healthy adults: an 18-week, single-group crossover placebo-controlled trial. Integr Med (Encinitas). 2026;25(2):12-19. PMID 42222203 (crossover trial, n=34, ages 40-65; 300 mg/day GG for 8 weeks; CoQ10 declined during placebo but maintained during GG; total testosterone increased significantly in men with baseline < 600 ng/dL; only published human RCT at this dose)

Ghee

Full name
Clarified Butter (Grass-Fed)
Type
Saturated fat / fat-soluble vitamin carrier
What it does
Butter with milk solids and water removed, leaving pure butterfat. Grass-fed ghee contains CLA (conjugated linoleic acid), butyrate (short-chain fatty acid), fat-soluble vitamins (A, D, K2 MK-4), and a favourable saturated/monounsaturated fat profile. High smoke point (250 degrees C) makes it stable for cooking. Often added to morning coffee as a lipid vehicle for fat-soluble supplements during a fasting window.
Benefits
Fat-soluble supplement absorption, clean energy in fasted state, anti-inflammatory (butyrate and CLA), gut health, Vitamin K2 MK-4 natural source.
Risks/considerations
High in saturated fat: count it within total saturated fat intake, though grass-fed sources are qualitatively different from industrial equivalents.
Optimal dosing
1-2 tbsp as a fat-soluble supplement carrier or cooking fat. Small amounts (1-2 tsp) in coffee do not meaningfully raise insulin and are compatible with extended fasting protocols.
Genetic qualifiers
TCF7L2 TT: the type 2 diabetes risk variant makes monitoring saturated fat intake worthwhile.
Found in
Dairy (grass-fed ruminants).
Related
Butyrate / Sodium Butyrate · CLA · Vitamin K2 MK-4 · C15:0

Glutathione

Full name
Glutathione (GSH)
Type
Master endogenous antioxidant / Phase II conjugator
What it does
A tripeptide (glycine + cysteine + glutamate) that is the body's primary intracellular antioxidant and the substrate for Phase II glutathione conjugation (GSTP1 enzyme). Neutralises reactive oxygen species, conjugates toxins for elimination, recycles other antioxidants (Vitamin C, Vitamin E, CoQ10), and maintains cellular redox balance. Cysteine (from NAC or transsulfuration) is the rate-limiting precursor.
Benefits
Detoxification, antioxidant recycling, immune function, liver health, skin health, mitochondrial protection.
Risks/considerations
Where conjugation enzyme activity is reduced (as in individuals with GSTP1 GG variants), more substrate (glutathione) helps compensate for the slower enzyme. Adequate methylation support increases transsulfuration flux and with it endogenous glutathione production. Direct supplementation: liposomal or S-acetyl forms required for systemic delivery (standard oral largely degraded in gut). Direct supplementation is reserved for cases of demonstrated deficiency or acute oxidative stress.
Optimal dosing
Endogenous support via NAC (cysteine precursor) + methylation support (transsulfuration). Direct supplementation: 250-500 mg liposomal/S-acetyl form if needed for acute support.
Genetic qualifiers
GSTP1 GG: reduced Phase II glutathione conjugation. Primary mitigation is adequate substrate (NAC + transsulfuration support) rather than direct supplementation.
Found in
Produced endogenously. Small dietary amounts in avocado, asparagus, cruciferous vegetables (mostly degraded in digestion).
Related
NAC · Cysteine · Transsulfuration · Phase II Detox · Selenium · Ferroptosis

Glycine

Full name
Glycine (the simplest amino acid)
Type
Non-essential amino acid / multi-function metabolite
What it does
The simplest amino acid, with surprisingly broad roles. Structural: the most abundant amino acid in collagen (every third residue), providing the flexibility collagen chains need for triple-helix formation. Neurotransmitter: inhibitory neurotransmitter in the brainstem and spinal cord, and a co-agonist at NMDA receptors. Biosynthetic precursor: contributes to glutathione synthesis (glycine + cysteine + glutamate), creatine synthesis, haem synthesis, purines, and bile acids. Detoxification: conjugates with benzoic acid and other compounds for Phase II elimination. "Non-essential" in the sense that it can be synthesised endogenously, but synthesis often falls short of demand under high collagen synthesis or detoxification load.
Benefits
Connective tissue support (collagen synthesis), glutathione precursor, sleep quality (inhibitory neurotransmitter, particularly at 3 g before bed), anti-inflammatory, detoxification support, creatine synthesis.
Risks/considerations
Well tolerated at supplemental doses. At 3 g/day for sleep, no known adverse effects. Collagen peptide supplementation provides meaningful glycine incidentally (approximately 3 g per 10 g collagen).
Optimal dosing
3-10 g/day. 3 g before bed for sleep quality; higher doses for connective tissue and glutathione support. Largely provided by collagen peptide supplementation and dietary protein.
Found in
Skin-on meat, bone broth, gelatin, collagen. Can also be supplemented directly as glycine powder.
Related
Collagen Peptides · Glutathione · Cysteine · Creatine · GABA-A Receptor

HMB

Full name
Beta-Hydroxy Beta-Methylbutyrate
Type
Leucine metabolite / anti-catabolic agent
What it does
A metabolite of the amino acid leucine. Inhibits muscle protein breakdown (via ubiquitin-proteasome pathway suppression) and supports muscle protein synthesis via mTOR activation. Particularly effective for preventing muscle loss during caloric restriction, fasting, or aging. Synergizes with EAAs.
Benefits
Muscle preservation during fasting windows, anti-catabolic during OMAD protocol, lean mass maintenance, recovery support, potential cardiovascular benefits.
Risks/considerations
Well tolerated. Most effective in older individuals (55+) and those in catabolic states (fasting, caloric restriction).
Optimal dosing
1-3 g/day divided across the day. 3 g/day shows the strongest evidence for muscle preservation during fasting or caloric restriction.
Found in
Trace amounts in citrus fruits, catfish, alfalfa.
Related
EAAs · mTOR · Autophagy

Inositol

Full name
Inositol (Myo-Inositol)
Type
Pseudovitamin / second messenger precursor
What it does
A carbocyclic sugar that is a precursor to phosphatidylinositol signalling molecules (PI3K pathway, insulin signalling). Supports serotonin and dopamine receptor function. Has anxiolytic effects and supports insulin sensitivity. Present in both Choline & Inositol supplement and L-Theanine formula.
Benefits
Insulin sensitization, mood and anxiety support, cognitive function, neurotransmitter receptor support.
Risks/considerations
Well tolerated. Very high doses (12-18 g) used therapeutically for OCD/anxiety: standard maintenance doses (500-1,000 mg) are well below this range.
Optimal dosing
500-1,000 mg/day maintenance. Up to 4,000 mg/day used therapeutically for PCOS, OCD, and anxiety.
Found in
Citrus fruits, cantaloupe, kidney beans, whole grains.
Related
Choline · Phosphatidylcholine

Krill Oil / Omega-3

Full name
Krill Oil (EPA + DHA + Phospholipid-bound Omega-3 + Astaxanthin)
Type
Marine omega-3 fatty acids / anti-inflammatory
What it does
Provides EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) in phospholipid form, which is more bioavailable than the triglyceride form in fish oil. EPA reduces inflammatory eicosanoids. DHA is a structural component of brain cell membranes and the retina. Krill also contains astaxanthin (a potent carotenoid antioxidant) and naturally contains the phospholipid carrier.
Benefits
Systemic anti-inflammatory, cardiovascular health, brain health, triglyceride reduction, joint health, insulin sensitivity. Phospholipid form absorbs without food and has better brain penetration.
Risks/considerations
Shellfish allergy contraindication. Blood thinning at high doses. Krill is more sustainable and more bioavailable than fish oil at equivalent doses.
Optimal dosing
1-3 g krill oil/day (providing approximately 300-600 mg combined EPA+DHA). Fish oil is an acceptable alternative at equivalent EPA+DHA doses.
Found in
Fatty fish (salmon, mackerel, sardines, herring), krill.
Related
C15:0 · Ferroptosis · Triglycerides · HDL

L-Carnitine

Full name
L-Carnitine Tartrate
Type
Amino acid derivative / fatty acid transporter
What it does
Shuttles long-chain fatty acids across the inner mitochondrial membrane for beta-oxidation (fat burning). Endogenous synthesis requires lysine, methionine, vitamin C, and B vitamins. Tartrate form has superior absorption. Pairs well with caffeine for synergistic fat oxidation during fasting windows.
Benefits
Enhanced fat oxidation, mitochondrial fuel delivery, recovery (tartrate form shows muscle damage reduction), insulin sensitivity, potential male fertility support.
Risks/considerations
Gut bacteria convert carnitine to TMAO; L. Reuteri may mitigate this. Impaired methylation can reduce endogenous synthesis, which supplemental L-carnitine offsets.
Optimal dosing
500-2,000 mg/day. L-Carnitine tartrate or ALCAR (acetyl-L-carnitine) forms preferred; tartrate for physical performance, ALCAR for cognitive and mitochondrial applications.
Genetic qualifiers
MTHFR TT: methylation impairment reduces endogenous carnitine synthesis via methionine pathway.
Found in
Red meat (highest), poultry, fish. Very low in plant foods.
Related
Methylation Cycle · ATP · Mitochondrial Biogenesis

L-Theanine

Full name
L-Theanine
Type
Amino acid / anxiolytic / cognitive enhancer
What it does
A non-protein amino acid found in tea that promotes alpha brain wave activity (alert relaxation), modulates GABA receptors (anxiolytic), and synergises with caffeine: L-theanine smooths the stimulant edge of caffeine while preserving (and sometimes enhancing) cognitive benefits.
Benefits
Reduced caffeine jitteriness and anxiety, sustained focus, improved attention, reduced stress response, sleep quality support at higher doses.
Risks/considerations
Well tolerated. Can potentiate sedatives at high doses. Standard supplemental doses (200-400 mg) are moderate and well within safe range.
Optimal dosing
100-400 mg/day, ideally paired with caffeine at a 2:1 ratio (theanine:caffeine).
Found in
Green tea (50 mg per cup), black tea.
Related
Circadian Rhythm · GABA-A Receptor

L. Reuteri

Full name
Lactobacillus reuteri (ATCC PTA 6475 + DSM 17938 strains)
Type
Probiotic / keystone gut organism
What it does
A keystone gut bacterium largely absent from modern microbiomes due to antibiotic overuse. Produces reuterin (antimicrobial), supports gut barrier integrity, produces oxytocin via vagus nerve stimulation, enhances nutrient absorption (including C15:0), suppresses H. pylori, and modulates immune function. The specific strains used in documented research are required for the effects: generic L. reuteri supplements use different strains with different properties.
Benefits
Gut health restoration, skin collagen and wound healing, oxytocin production (mood, libido, social bonding, muscle mass), bone density, immune function, testosterone support, enhanced Vinia/resveratrol conversion.
Risks/considerations
Commercial L. reuteri products generally provide insufficient CFU counts and may not use the specific strains (ATCC PTA 6475, DSM 17938) with documented benefits. Homemade 36-hour fermented yogurt using these strains is the recommended delivery method.
Optimal dosing
Standard probiotic doses (1-10 billion CFU) in commercial products are generally insufficient for the benefits documented in Sonnenburg and Attia research. High-CFU delivery via 36-hour fermented yogurt (Lactobacillus reuteri ATCC PTA 6475 + DSM 17938 strains) provides approximately 200 billion CFU and is the evidence-supported approach.
Found in
Human breast milk, fermented foods (variable strain content).
Related
Butyrate / Sodium Butyrate · Resveratrol · C15:0

Milk Thistle / Silymarin

Full name
Silymarin (standardised extract of Silybum marianum / Milk Thistle)
Type
Hepatoprotective compound / Phase II inducer
What it does
A complex of flavonolignans (primarily silybin) that protects liver cells from toxin-induced damage, induces Phase II detoxification enzymes (Nrf2 pathway), reduces hepatic inflammation, and supports bile acid synthesis and flow.
Benefits
Liver protection, Phase II Phase II detoxification support, anti-inflammatory (hepatic), glutathione synthesis induction, potential insulin sensitisation.
Risks/considerations
Well tolerated.
Optimal dosing
140-420 mg silymarin/day, standardised extract. Often combined with berberine and other liver-supportive compounds.
Found in
Milk thistle seed.
Related
Phase II Detox · Glutathione · Berberine

NAC (N-Acetyl Cysteine)

Full name
N-Acetyl-L-Cysteine
Type
Glutathione precursor / mucolytic / antioxidant
What it does
Directly provides cysteine, the rate-limiting amino acid for glutathione synthesis. Also has mucolytic properties (breaks disulfide bonds in mucus), supports Phase II Phase II detoxification, and may have direct antioxidant properties. Where glutathione conjugation activity is reduced, more substrate compensates for the slower enzyme.
Benefits
Glutathione elevation, detoxification support, respiratory health, liver protection.
Risks/considerations
GI discomfort (bloating, cramping) can occur, particularly when taken on an empty stomach. Take with food if sensitive. Well tolerated at 1-2 g/day.
Optimal dosing
600-1,800 mg/day in divided doses. Take away from methylcobalamin and zinc as NAC may chelate these minerals.
Genetic qualifiers
GSTP1 GG: reduced glutathione conjugation makes cysteine substrate availability via NAC particularly valuable.
Found in
High-protein foods (cysteine precursor). NAC itself is only available as a supplement.
Related
Glutathione · Transsulfuration · Phase II Detox · Chelation
References
  1. Kumar P, et al. Supplementing Glycine and N-Acetylcysteine (GlyNAC) in Older Adults Improves Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Inflammation, Physical Function, and Aging Hallmarks: A Randomized Clinical Trial. J Gerontol A Biol Sci Med Sci. 2023;78(1):75-89. PMID 35975308 (RCT, n=24 older adults; GlyNAC (glycine + NAC) for 16 weeks corrected GSH deficiency, oxidative stress, mitochondrial dysfunction, inflammation, and multiple aging hallmarks; NAC provides cysteine, the rate-limiting precursor for glutathione synthesis)

Nattokinase

Full name
Nattokinase (subtilisin NAT)
Type
Fibrinolytic enzyme / cardiovascular compound
What it does
A serine protease enzyme extracted from natto (fermented soybeans) that directly degrades fibrin, the protein scaffold of blood clots. Unlike pharmaceutical thrombolytics, nattokinase works systemically at oral doses and has a prolonged effect due to stimulation of endogenous tissue plasminogen activator (tPA). Also shown to degrade amyloid fibrils in vitro, generating research interest in neurological applications. Has mild blood pressure-lowering and anti-platelet effects.
Benefits
Fibrinolysis (clot degradation), cardiovascular protection, blood pressure support, potential microcirculation improvement. Extended fasting and low-inflammatory dietary patterns create a favourable baseline for nattokinase's fibrinolytic effects. Research interest in amyloid degradation (Alzheimer's prevention angle).
Risks/considerations
Hypotension risk when stacking with other cardiovascular compounds or extended fasting protocols: monitor blood pressure. Contraindicated with anticoagulants (Warfarin, therapeutic aspirin). Discontinue 2 weeks before surgery. Take away from meals (enzyme activity reduced by food). Quarterly cycling approach may be preferable to daily use to target fibrin accumulation without chronic hypotensive risk.
Optimal dosing
2,000-4,000 FU/day (fibrinolytic units). Take fasted, away from meals. Quarterly cycling approach (during fasting windows) may be preferable to daily use given hypotension risk with extended fasting protocols.
Found in
Natto (fermented soybeans); not present in meaningful amounts in other foods.
Related
Nitric Oxide · OMAD · Warfarin

NMN

Full name
Nicotinamide Mononucleotide
Type
Nucleotide / NAD+ precursor / longevity supplement
What it does
A direct precursor to NAD+ that bypasses several enzymatic steps in the NAD+ synthesis pathway. The SLC (Slc12a8 transporter) enteric-coated formulation ensures delivery to the small intestine where the specific transporter for NMN is expressed, improving bioavailability over standard capsules. Also provides TMG (300 mg per serving) to support methylation and prevent potential methyl drain.
Benefits
NAD+ restoration (declines ~50% per decade after 30), energy metabolism, sirtuin activation, DNA repair, circadian regulation, metabolic health.
Risks/considerations
TMG co-supplementation in the Renue formula is appropriate to address potential methyl consumption. Should be taken early in the day to avoid circadian disruption (NAD+ has diurnal variation).
Optimal dosing
250-900 mg/day. RCTs support 250 mg/day for insulin sensitivity benefits and 600 mg/day as the dose associated with maximal NAD+ restoration and physical performance in dose-ranging trials. Enteric-coated or sublingual forms preferred to protect from stomach acid degradation. Take in the morning to align with NAD+ diurnal variation.
Found in
Trace amounts in edamame, broccoli, cucumber. Not achievable through diet at therapeutic doses.
Related
NAD+ · Sirtuins · Apigenin · TMG · Methylation Cycle
References
  1. Yoshino M, et al. Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women. Science. 2021;372(6547):1224-1229. PMID 33888596 (RCT, n=25; 250 mg/day for 10 weeks; improved insulin-stimulated glucose disposal and skeletal muscle insulin signalling in postmenopausal women with prediabetes)
  2. Yi L, et al. The efficacy and safety of β-nicotinamide mononucleotide (NMN) supplementation in healthy middle-aged adults: a randomized, multicenter, double-blind, placebo-controlled, parallel-group, dose-dependent clinical trial. GeroScience. 2023;45(1):29-43. PMID 36482258 (RCT, n=80; 300/600/900 mg/day for 60 days; all doses raised NAD+; 600 mg associated with maximal NAD+ restoration and physical performance improvement; well tolerated to 900 mg)

Phosphatidylcholine

Full name
Phosphatidylcholine (PC)
Type
Phospholipid / cell membrane component
What it does
The most abundant phospholipid in cell membranes. Critical for membrane integrity, lipid transport (HDL, VLDL), liver fat metabolism (NAFLD prevention), and neurotransmitter precursor (acetylcholine). Synthesised via the CDP-choline pathway (requires Choline) and the PEMT pathway (requires methylation). PEMT CT variant reduces the methylation-dependent synthesis route.
Benefits
Cell membrane health, liver function, cognitive function, lipid metabolism.
Risks/considerations
Where the methylation-dependent synthesis route is impaired (as in individuals with PEMT CT variants), dietary and supplemental choline become more important to compensate.
Genetic qualifiers
PEMT CT: reduced phosphatidylcholine synthesis via methylation pathway.
Found in
Eggs (yolk), liver, sunflower lecithin, soy lecithin.
Related
Choline · Methylation Cycle · Inositol · HDL

PQQ

Full name
Pyrroloquinoline Quinone
Type
Redox cofactor / mitochondrial biogenesis activator
What it does
A redox-active compound that activates PGC-1alpha (the master regulator of mitochondrial biogenesis), stimulating the creation of new mitochondria. Also functions as an antioxidant, neuroprotective agent, and may support NGF (nerve growth factor) synthesis. Works synergistically with CoQ10.
Benefits
Mitochondrial biogenesis, neuroprotection, cognitive function, antioxidant, heart health.
Risks/considerations
Take with food. Well tolerated at standard doses. Often combined with CoQ10 in a single formulation.
Optimal dosing
10-20 mg/day with food, ideally alongside CoQ10.
Found in
Natto, fermented soy, spinach, green tea, kiwi. Difficult to reach therapeutic doses through diet.
Related
CoQ10 · CoA · Mitochondrial Biogenesis · NAD+ · Acetylcholine

R-ALA (R-Alpha Lipoic Acid)

Full name
R-Alpha Lipoic Acid (Na-RALA = Sodium R-Lipoic Acid, stabilized form)
Type
Mitochondrial antioxidant / AMPK activator / insulin sensitizer / glutathione regenerator
What it does
A naturally occurring mitochondrial cofactor that functions as an essential component of the pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase complexes, linking glycolysis to the TCA cycle. Unique among antioxidants in being both fat and water-soluble, allowing it to neutralise reactive oxygen species in virtually all cellular compartments. Activates AMPK via mitochondrial signalling, producing insulin sensitization. Regenerates glutathione, Vitamin C, Vitamin E, and CoQ10 from their oxidised forms, effectively multiplying the antioxidant network. Also chelates heavy metals. Na-RALA is the sodium salt of R-ALA: stabilized to prevent thermal polymerisation that makes standard R-ALA unstable, and significantly more bioavailable than either standard R-ALA or racemic alpha-lipoic acid (which contains the less active S-ALA form).
Benefits
Insulin sensitization, mitochondrial energy metabolism, broad-spectrum antioxidant recycling (amplifies glutathione, CoQ10, and vitamins), neuroprotection, heavy metal chelation, anti-inflammatory via Nrf2 activation.
Risks/considerations
Competes with biotin for the same intestinal transporter (SMVT): choose a formulation that includes biotin or supplement separately. Can lower blood glucose meaningfully; take with food. Standard (racemic) alpha-lipoic acid contains S-ALA which may antagonise R-ALA effects: use R-specific forms only.
Optimal dosing
100-300 mg Na-RALA/day with food. Use Na-RALA (sodium R-lipoic acid) form: more stable and more bioavailable than standard R-ALA or racemic alpha-lipoic acid. Include Biotin (150 mcg) when supplementing to prevent transporter competition.
Genetic qualifiers
TCF7L2 TT: 2x T2D risk makes AMPK activation and insulin sensitization via R-ALA particularly relevant. GSTP1 GG: glutathione regeneration activity addresses the reduced Phase II conjugation bottleneck from the supply side.
Found in
Small amounts in organ meats, spinach, broccoli, potatoes. Not achievable at therapeutic doses through diet.
Related
AMPK]] · Glutathione]] · CoQ10 · Biotin]] · Mitochondrial Biogenesis]] · Phase II Detox]] · Chelation

Resveratrol / Piceid Resveratrol

Full name
Piceid Resveratrol (trans-resveratrol glycoside)
Type
Polyphenol / sirtuin activator / NO modulator
What it does
A stilbenoid polyphenol from red grapes. Vinia uses the piceid (glycoside) form, which is 25x more water-soluble than standard trans-resveratrol, and is released as resveratrol by gut microbiota over 12 hours: creating sustained delivery. Dual cardiovascular mechanism: eNOS upregulation (nitric oxide production, vasodilation) and endothelin-1 suppression (vasoconstriction inhibition). Also a sirtuin activator (particularly SIRT1).
Benefits
Cardiovascular protection (FMD trial: 70% arterial dilation vs baseline), anti-inflammatory, sirtuin activation, longevity signalling, anti-cancer potential.
Risks/considerations
Conversion of piceid to resveratrol depends on gut microbiota, so efficiency varies between individuals. Standard resveratrol supplements lack the piceid form's bioavailability and sustained-release profile.
Optimal dosing
400-600 mg piceid resveratrol/day, or standard resveratrol at 100-500 mg/day. Piceid form offers superior bioavailability. Take with food for fat-soluble absorption.
Found in
Red grape skins, red wine (low concentrations), peanuts, blueberries.
Related
Nitric Oxide · Sirtuins · L. Reuteri · NAD+

TMG (Trimethylglycine)

Full name
Trimethylglycine (Betaine)
Type
Methyl donor / osmolyte
What it does
Donates methyl groups via the BHMT (betaine-homocysteine methyltransferase) pathway, converting homocysteine directly to methionine without requiring MTHFR. This is a parallel and complementary pathway to the methylfolate/B12 route. Because the BHMT route does not depend on MTHFR, TMG supports remethylation whatever a person's MTHFR status. Doses in the range of normal dietary intake (1,500-3,000 mg/day) lower fasting homocysteine in healthy adults.4
Benefits
Homocysteine reduction (BHMT pathway, MTHFR-independent), SAMe production support, liver protection (osmolyte), muscle hydration, exercise performance, cardiovascular protection.
Risks/considerations
Doses of 4,000 mg/day and above raise LDL cholesterol and total cholesterol.2,3 Overmethylation symptoms (anxiety, irritability, insomnia) are possible at higher doses; see Genetic qualifiers for the role of COMT.
Optimal dosing
1,500-3,000 mg/day, the range in which trials show homocysteine lowering without adverse lipid effects.2,4 Around 1,000 mg/day, combined with B vitamins, lowered homocysteine in adults with elevated levels.1 Doses of 4,000 mg/day and above lower homocysteine somewhat further but raise LDL cholesterol (~10 mg/dL) and total cholesterol (~14 mg/dL): monitor lipids at that level.2,3
Genetic qualifiers
MTHFR TT: TMG provides a parallel methylation route via BHMT that bypasses the impaired MTHFR enzyme, making it a useful complement to methylfolate; the population dose range still applies, including the lipid caution at 4,000 mg/day and above. COMT: slow COMT activity (Val/Met or Met/Met) is commonly linked to overmethylation symptoms from methyl donors and fast COMT (Val/Val, GG) to lower risk; clinical evidence for this is limited.
Found in
Beetroot (highest), spinach, quinoa, wheat germ, shellfish.
Related
Methylation Cycle · Homocysteine · SAMe · Methylfolate · LDL
References
  1. Lu X-t, et al. Effects of low-dose B vitamins plus betaine supplementation on lowering homocysteine concentrations among Chinese adults with hyperhomocysteinemia: a randomized, double-blind, controlled preliminary clinical trial. European Journal of Nutrition. 2023;62(3):1431-1441. PMID 36717385 (RCT, n=100; 1g betaine/day + B vitamins; significant homocysteine reduction at 12 weeks)
  2. Ashtary-Larky D, et al. Effects of betaine supplementation on cardiovascular markers: A systematic review and meta-analysis. Critical Reviews in Food Science and Nutrition. 2022;62(23):6516-6533. PMID 33764214 (systematic review + meta-analysis; doses <4g/day reduce homocysteine without adverse lipid effects; doses ≥4g/day raise LDL ~10 mg/dL and total cholesterol ~14 mg/dL)
  3. Olthof MR, et al. Effect of homocysteine-lowering nutrients on blood lipids: results from four randomised, placebo-controlled studies in healthy humans. PLoS Medicine. 2005;2(5):e135. PMID 15916468 (pooled analysis of 4 RCTs in healthy adults; betaine 6g/day significantly lowered homocysteine but raised LDL 0.36 mmol/L and triacylglycerol 0.14 mmol/L relative to placebo)
  4. Olthof MR, et al. Low dose betaine supplementation leads to immediate and long term lowering of plasma homocysteine in healthy men and women. Journal of Nutrition. 2003;133(12):4135-4138. PMID 14652361 | DOI (RCT, n=76 healthy adults; 1.5, 3 and 6 g/day for 6 weeks lowered fasting homocysteine by 12%, 15% and 20% versus placebo)

Tongkat Ali

Full name
Eurycoma longifolia (Tongkat Ali / Long Jack)
Type
Herbal adaptogen / testosterone support
What it does
Inhibits sex hormone-binding globulin (SHBG), increasing free testosterone availability. Also has adaptogenic properties (cortisol modulation), and may directly stimulate testicular testosterone production via LH pathway. Cycled monthly with Fadogia Agrestis to prevent receptor downregulation.
Benefits
Free testosterone increase, stress resilience, libido, lean mass support, energy.
Risks/considerations
Well-studied compared to Fadogia Agrestis. Quality matters significantly: standardised extract (root, not bark) required. Cycle to avoid receptor downregulation.
Optimal dosing
200-400 mg standardised extract/day. Cycle monthly with Fadogia Agrestis to prevent receptor desensitisation.
Found in
Roots of Eurycoma longifolia tree (Southeast Asia).
Related
Fadogia Agrestis

Urolithin A

Full name
Urolithin A
Type
Postbiotic / mitophagy activator
What it does
A metabolite produced by gut bacteria from ellagitannins (found in pomegranates, walnuts, berries). Pharmaceutical-grade urolithin A ensures consistent dosing. Activates mitophagy: the selective autophagy of damaged mitochondria: clearing dysfunctional mitochondria and stimulating mitochondrial biogenesis. The only compound shown to directly activate mitophagy at clinically validated doses in humans.
Benefits
Mitochondrial quality control, muscle strength and endurance (clinical trials: +12% improvement in muscle strength in older adults), cellular energy, longevity.
Risks/considerations
Pharmaceutical-grade urolithin A is important: gut bacteria conversion of dietary ellagitannins to urolithin A is highly variable and unreliable. Fat-soluble; take with a fat-containing meal.
Optimal dosing
500 mg/day (the clinical trial dose used in human longevity studies). Take in the morning with or without food.
Found in
Cannot be obtained reliably through diet; pharmaceutical-grade supplementation required.
Related
Autophagy · Mitochondrial Biogenesis · C15:0 · NMN

The BioForge Glossary · 27 entries

Vitamins and Minerals

Essential micronutrients: fat-soluble vitamins, B vitamins, macro and trace minerals.

Show the entriesHide the entries

Biotin

Full name
Biotin (Vitamin B7)
Type
Water-soluble B vitamin / coenzyme
What it does
Coenzyme for carboxylase enzymes involved in fatty acid synthesis, gluconeogenesis, and amino acid catabolism. Critical for preventing biotin-ALA transporter competition when taking alpha-lipoic acid.
Benefits
Metabolic enzyme support, hair/nail health, glucose metabolism.
Risks/considerations
High-dose biotin interferes with thyroid and troponin lab tests: disclose supplementation before blood work. Included in R-ALA formulation (150 mcg) specifically to prevent competitive inhibition of biotin transport by ALA.
Optimal dosing
30-300 mcg/day maintenance. When supplementing R-ALA, include biotin in the formulation to prevent transporter competition.
Found in
Eggs (especially yolk), liver, salmon, nuts.
Related
Metalloid · Methylation Cycle · Carboxylase · R-ALA · Troponin
References
  1. Cervantes A, Daley SF. Biotin. StatPearls. Updated Sep 2025. PMID 31613531 | Full Text
  2. Gifford JL, et al. Biotin interference in clinical immunoassays. Clinical Biochemistry. 2019;65:61-63. PMID 30582902 (abstract only)
  3. Prasad PD, et al. Cloning of a mammalian sodium-dependent multivitamin transporter mediating uptake of pantothenate, biotin, and lipoate. Journal of Biological Chemistry. 1998;273(13):7501-6. PMID 9516450 (cell study; founding SMVT paper)

Boron

Full name
Boron (trace mineral)
Type
Trace mineral
What it does
Supports testosterone and estrogen metabolism, bone mineralization, magnesium absorption, and Vitamin D3 utilization. Also has anti-inflammatory properties.
Benefits
Hormonal balance, bone health, joint health, cognitive function, Vitamin D3 activation support.
Risks/considerations
Upper limit approximately 20 mg/day. Well tolerated at standard doses.
Optimal dosing
3-6 mg/day. Upper limit approximately 20 mg/day.
Found in
Almonds, avocado, raisins, chickpeas.
Related
Vitamin D3 · Magnesium
References
  1. Naghii MR, et al. Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines. Journal of Trace Elements in Medicine and Biology. 2011;25(1):54-8. PMID 21129941 (abstract only; human study)
  2. Nielsen FH. Studies on the relationship between boron and magnesium which possibly affects the formation and maintenance of bones. Environmental Health Perspectives. 1994;102 Suppl 7:45-8. PMID 7889883 | PMC Full Text

Calcium

Full name
Calcium (Ca2+)
Type
Macro mineral
What it does
Structural component of bone and teeth. Essential for muscle contraction, nerve signalling, and blood clotting. Competes with magnesium for absorption.
Benefits
Bone density, muscle function, cardiovascular signalling.
Risks/considerations
High supplemental doses (1,000+ mg/day) associated with increased myocardial infarction risk.1 The mechanism involves acute serum calcium spikes increasing coagulability and calcification propensity: a risk not seen with dietary calcium. Mitigated by adequate K2 MK-4 and K2 MK-7, which activate Methyl Donor | MGP to direct calcium to bone. Keep supplemental calcium conservative (under 500 mg/day) unless correcting a documented deficiency.
Optimal dosing
200-500 mg/day supplemental alongside adequate dietary calcium. Do not supplement high doses without adequate K2 and D3.
Found in
Dairy, sardines, leafy greens, almonds.
Related
Vitamin K2 MK-4 · Vitamin K2 MK-7 · MGP · Vitamin D3 · Magnesium
References
  1. Bolland MJ, et al. Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis. BMJ. 2010;341:c3691. PMID 20671013 | PMC Full Text

Chromium

Full name
Chromium (Cr)
Type
Trace mineral / insulin cofactor
What it does
Enhances insulin receptor sensitivity, improving glucose uptake into cells. The nicotinate glycinate chelate form has superior bioavailability. (See Chelation)
Benefits
Insulin sensitization, blood glucose regulation, carbohydrate metabolism.
Risks/considerations
Well tolerated at supplemental doses. High doses (>1,000 mcg) associated with kidney concerns.
Optimal dosing
200-400 mcg/day. Nicotinate glycinate or polynicotinate forms preferred for bioavailability.
Genetic qualifiers
TCF7L2 TT: 2x T2D risk makes insulin-sensitizing micronutrients particularly relevant.
Found in
Broccoli, beef, turkey, whole grains.
Related
AMPK · Hypothalamus · Berberine · Chelation

Copper

Full name
Copper (Cu)
Type
Trace mineral / enzymatic cofactor
What it does
Cofactor for cytochrome c oxidase (Complex IV in mitochondria), superoxide dismutase (antioxidant), ceruloplasmin (iron metabolism), and dopamine beta-hydroxylase (catecholamine synthesis). Competes with zinc for absorption.
Benefits
Mitochondrial function, antioxidant defence, iron metabolism, neurotransmitter synthesis.
Risks/considerations
Zinc:copper ratio is critical: excess zinc without adequate copper causes copper deficiency. A 10:1 zinc:copper ratio (e.g. 20 mg zinc : 2 mg copper) is conservative and safe for daily maintenance.
Optimal dosing
1-2 mg/day. Maintain zinc:copper ratio at 10:1 or lower to prevent copper deficiency from zinc supplementation.
Found in
Liver, shellfish (oysters especially), dark chocolate, nuts.
Related
Zinc · ATP

Folate / Methylfolate

Full name
5-Methyltetrahydrofolate (5-MTHF) / L-Methylfolate
Type
Active B9 vitamin / methyl donor
What it does
The bioactive form of folate that bypasses the MTHFR enzyme. Standard folic acid requires MTHFR to convert to 5-MTHF, and in individuals with MTHFR TT variants (70-80% reduced activity) this conversion is severely impaired. Direct supplementation with methylfolate provides the active form the methylation cycle requires without depending on MTHFR. Essential for homocysteine remethylation to methionine.
Benefits
Methylation cycle support, homocysteine reduction, DNA synthesis, RBC formation, mood support (via serotonin/dopamine synthesis), cardiovascular risk reduction.
Risks/considerations
Do not use standard folic acid: it bypasses the problem without solving it and can accumulate as unmetabolised folic acid (UMFA), which may block folate receptors. Use only methylfolate (Quatrefolic or equivalent). Start low if prone to overmethylation symptoms (headache, anxiety, irritability); see Genetic qualifiers for the role of COMT.
Optimal dosing
400-1,000 mcg/day methylfolate. Use methylfolate (Quatrefolic or equivalent); do not use standard folic acid.
Genetic qualifiers
MTHFR TT: core intervention; bypasses 70-80% reduced MTHFR enzyme activity. RCT evidence shows significant homocysteine reduction at 400-800 mcg/day methylfolate/5-MTHF even in TT individuals, with TT genotype showing greater relative response than CC at equivalent doses. RCTs suggest a ceiling for folic acid homocysteine lowering at ~1,200 mcg/day (Huang 2024). Higher doses (up to 1,000-2,000 mcg/day) are used in clinical practice for broader methylation support in TT individuals, but are not established as superior to 800-1,200 mcg by RCT evidence for homocysteine lowering specifically: start low and titrate. COMT GG: fast catecholamine clearance means overmethylation symptoms are unlikely at typical methylfolate doses.
Found in
Leafy greens, legumes, liver (as folate, not methylfolate form).
Related
Methylation Cycle · Homocysteine · TMG · Methylcobalamin · SAMe
References
  1. Huang X, et al. Optimal folic acid dosage in lowering homocysteine: Precision Folic Acid Trial to lower homocysteine (PFAT-Hcy). European Journal of Nutrition. 2024. PMID 38478042 (RCT, n=2697; ceiling effect at 1.2 mg/day FA; MTHFR TT subgroup showed greater efficacy)
  2. Qin X, et al. MTHFR C677T and MTR A2756G polymorphisms and the homocysteine lowering efficacy of different doses of folic acid in hypertensive Chinese adults. Nutrition Journal. 2012;11:2. PMID 22230384 (RCT, n=480; 0.4 mg/day vs 0.8 mg/day FA; TT genotype shows attenuated response at 0.4 mg vs CC; greater relative reduction at 0.8 mg: higher doses benefit TT more than CC)
  3. Mazokopakis EE, et al. The effects of folinic acid and l-methylfolate supplementation on serum total homocysteine levels in healthy adults. Clinical Nutrition ESPEN. 2023;58:14-20. PMID 38056998 (RCT, n=272; l-methylfolate vs folinic acid for 3 months; MTHFR 677TT genotype showed significantly greater homocysteine reduction than CC or CT: confirms TT genotype responds more robustly to direct methylfolate)

Iodine

Full name
Iodine (I)
Type
Essential trace mineral / thyroid cofactor
What it does
Required for synthesis of thyroid hormones T3 and T4. These hormones regulate metabolism, body temperature, heart rate, and cognitive function.
Benefits
Thyroid function, metabolic rate regulation, cognitive function, immune support.
Risks/considerations
Both deficiency and excess are problematic. Standard supplementation targets the RDA (150 mcg). Avoid doses above 1,000 mcg/day without thyroid monitoring.
Optimal dosing
150-220 mcg/day. Avoid supplemental doses above 1,000 mcg/day without thyroid monitoring.
Found in
Seaweed, iodized salt, seafood, dairy.
Related
N/A

Magnesium

Full name
Magnesium (Mg2+)
Type
Macro mineral / cofactor for 300+ enzymatic reactions
What it does
Involved in ATP synthesis, DNA/RNA synthesis, protein synthesis, muscle relaxation, nerve transmission, and blood glucose regulation. Magnesium glycinate at bedtime supports sleep quality and HRV by activating GABA receptors and supporting parasympathetic tone. Most people are chronically deficient due to soil depletion.
Benefits
Sleep quality, HRV support, muscle relaxation and cramp prevention, insulin sensitivity, cardiovascular health, bone mineralisation, mood and anxiety reduction.
Risks/considerations
Glycinate form (amino acid chelate) is well absorbed and non-laxative: preferred over oxide (poorly absorbed) or citrate (laxative at higher doses).
Optimal dosing
300-500 mg elemental magnesium/day. Glycinate form preferred at bedtime for sleep and HRV support; malate form during the day for energy metabolism. Avoid oxide form (poorly absorbed).
Found in
Pumpkin seeds, dark chocolate, almonds, spinach, black beans. Heavily depleted from modern food supply.
Related
HRV · ATP · Circadian Rhythm · GABA-A Receptor · Chelation

Manganese

Full name
Manganese (Mn)
Type
Trace mineral / enzymatic cofactor
What it does
Cofactor for MnSOD (manganese superoxide dismutase, mitochondrial antioxidant enzyme), arginase (urea cycle), and glucosyltransferases (connective tissue synthesis). Important for bone formation and carbohydrate metabolism.
Benefits
Mitochondrial antioxidant defence, connective tissue, bone health, blood sugar regulation.
Risks/considerations
Excess manganese is neurotoxic (manganism). Standard supplemental doses (2-3 mg) are at the RDA and well within safe range.
Optimal dosing
2-3 mg/day. Avoid high supplemental doses; upper limit is 11 mg/day. Most people obtain sufficient manganese from diet; supplementation is typically via a comprehensive mineral complex.
Found in
Nuts, seeds, whole grains, leafy greens.
Related
Glutathione · ATP

Methylcobalamin (B12)

Full name
Methylcobalamin (active form of Vitamin B12)
Type
Active B vitamin / methyl donor
What it does
The neurologically active form of B12. Required for the methylation cycle (alongside methylfolate to remethylate homocysteine to methionine), myelin sheath synthesis, DNA synthesis, and red blood cell formation. Standard cyanocobalamin requires conversion; methylcobalamin is the direct active form.
Benefits
Neurological function, methylation cycle, homocysteine reduction, energy metabolism, mood and cognitive support.
Risks/considerations
Use only methylcobalamin (not cyanocobalamin) for optimal bioavailability. Deficiency causes irreversible neurological damage: a genuine risk with MTHFR TT due to increased demand.
Optimal dosing
500-1,000 mcg/day. Use methylcobalamin form (not cyanocobalamin).
Genetic qualifiers
MTHFR TT: increased B12 demand due to impaired methylation cycle throughput; 1,000-2,000 mcg/day may be warranted.3 Combined methylfolate + B6 + B12 supplementation in MTHFR mutation carriers with elevated homocysteine reduced total homocysteine from 19.4 to 6.9 μmol/L in a clinical study.3
Found in
Meat, fish, dairy, eggs. Not present in plants: vegans require supplementation.
Related
Methylation Cycle · Methylfolate · Homocysteine · SAMe
References
  1. Kwok T, et al. A randomized placebo-controlled trial of using B vitamins to prevent cognitive decline in older mild cognitive impairment patients. Clinical Nutrition. 2020;39(8):2399-2405. PMID 31787369 (RCT; methylcobalamin 500 mcg + folic acid 400 mcg daily; effective homocysteine lowering; depression scores improved at 12 months)
  2. Schijns W, et al. Efficacy of oral compared with intramuscular vitamin B-12 supplementation after Roux-en-Y gastric bypass: a randomized controlled trial. American Journal of Clinical Nutrition. 2018;108(1):6-12. PMID 29931179 (RCT; oral methylcobalamin 1,000 mcg/day non-inferior to IM hydroxocobalamin injections for B12 repletion; both significantly reduced homocysteine and MMA at 6 months)
  3. Serapinas D, et al. The importance of folate, vitamins B6 and B12 for the lowering of homocysteine concentrations for patients with recurrent pregnancy loss and MTHFR mutations. Reprod Toxicol. 2017;72:159-163. PMID 28689805 (clinical study, n=16; supraphysiologic methylfolate + B6 + B12 in MTHFR mutation carriers reduced total homocysteine from 19.4 ± 5.3 to 6.9 ± 2.2 μmol/L; supports elevated B12 requirement in MTHFR TT genotype)

Molybdenum

Full name
Molybdenum (Mo)
Type
Trace mineral / enzymatic cofactor
What it does
Cofactor for sulfite oxidase (converts toxic sulfite to sulfate), xanthine oxidase (purine catabolism), and aldehyde oxidase (drug metabolism). Sulfite oxidase function is particularly relevant for sulfur amino acid metabolism and detoxification.
Benefits
Sulfite detoxification, uric acid metabolism, drug/compound clearance.
Risks/considerations
Deficiency rare in Western diets. Standard supplemental doses (150 mcg) are at the RDA.
Optimal dosing
45-150 mcg/day. Typically provided via comprehensive mineral complex rather than standalone supplementation.
Found in
Legumes, grains, leafy vegetables.
Related
Transsulfuration · Phase II Detox

Niacin / Niacinamide (B3)

Full name
Niacin (nicotinic acid) / Niacinamide (nicotinamide)
Type
Water-soluble B vitamin / NAD+ precursor
What it does
A precursor to NAD+. Niacinamide is the non-flushing form used in most B complexes. At ordinary supplemental doses (well below megadosing), it primarily serves as a NAD+ building block and methyl acceptor.
Benefits
NAD+ precursor, energy metabolism, DNA repair, skin health, cognitive function.
Risks/considerations
High-dose niacinamide (>3 g/day) can be a methyl drain by consuming SAMe: a concern at megadose levels, not at ordinary supplemental doses.
Optimal dosing
14-35 mg/day RDA for general health. Niacinamide (non-flushing) preferred for NAD+ support at 100-500 mg/day. Avoid megadosing niacinamide (>3 g/day) due to methyl drain risk via SAMe consumption.
Found in
Meat, fish, poultry, nuts, legumes.
Related
NAD+ · Methylation Cycle · SAMe

Pantothenic Acid (B5)

Full name
Pantothenic Acid (Vitamin B5)
Type
Water-soluble B vitamin / CoA precursor
What it does
Precursor to Coenzyme A (CoA), which is essential for fatty acid metabolism (beta-oxidation and synthesis), the TCA cycle (citric acid cycle), and acetylcholine synthesis. Also involved in adrenal hormone synthesis and stress response.
Benefits
Energy metabolism, fat burning support, adrenal health, acetylcholine precursor.
Risks/considerations
Deficiency rare given broad food distribution. Well tolerated.
Optimal dosing
5-10 mg/day RDA. B complex formulations typically provide 50-500 mg/day; well tolerated at higher doses.
Found in
Widespread in almost all foods: liver, sunflower seeds, salmon, avocado.
Related
ATP · Choline

Potassium

Full name
Potassium (K+)
Type
Macro mineral / electrolyte
What it does
Primary intracellular cation. Essential for membrane potential, nerve conduction, muscle contraction (including cardiac), and fluid balance. Works in concert with sodium (extracellular) to maintain electrochemical gradients.
Benefits
Cardiovascular health, blood pressure regulation, muscle function, hydration, nerve signalling.
Risks/considerations
Most Western diets are potassium-deficient relative to sodium. Potassium deficiency contributes to hypertension and muscle cramping.
Optimal dosing
2,600-3,400 mg/day total from diet and supplements. Supplementation is typically modest (150-500 mg/day); dietary sources (avocado, leafy greens, legumes) should provide the majority.
Found in
Bananas, avocado, sweet potato, salmon, leafy greens.
Related
Sodium · Magnesium

Pyridoxal-5-Phosphate (B6)

Full name
Pyridoxal-5'-Phosphate (P5P, active Vitamin B6)
Type
Active B vitamin / transamination coenzyme
What it does
The active form of B6, functioning as a coenzyme in over 100 enzymatic reactions: primarily transamination (amino acid metabolism), decarboxylation (neurotransmitter synthesis: serotonin from 5-HTP, dopamine from L-DOPA, GABA from glutamate), and the Transsulfuration transsulfuration pathway (homocysteine to cysteine via CBS and CSE enzymes).
Benefits
Neurotransmitter synthesis, transsulfuration support (homocysteine to cysteine to glutathione), amino acid metabolism, mood, sleep (melatonin/serotonin pathway).
Risks/considerations
High doses (>200 mg/day long term) associated with peripheral neuropathy. Standard supplemental doses (25-100 mg P5P) are well within safe range. Use P5P form (not pyridoxine HCl) for direct bioavailability.
Optimal dosing
25-100 mg P5P/day. Use P5P form (not pyridoxine HCl) for direct bioavailability.
Genetic qualifiers
MTHFR TT: B6 is a cofactor for the Transsulfuration transsulfuration pathway, which is an important homocysteine disposal route when the methylation pathway is impaired.
Found in
Poultry, fish, potatoes, bananas, fortified foods.
Related
Transsulfuration · Homocysteine · Glutathione · GABA-A Receptor
References
  1. Reddy P. Preventing Vitamin B6-Related Neurotoxicity. American Journal of Therapeutics. 2021;29(6):e637-e643. PMID 36608063 (review; recommends PLP form; notes current RDA frequently results in inadequate B6 status; suggests 50-100 mg weekly preferred over daily at supraphysiologic doses to prevent toxicity)
  2. Dalto DB, Matte JJ. Pyridoxine (Vitamin B₆) and the Glutathione Peroxidase System; a Link between One-Carbon Metabolism and Antioxidation. Nutrients. 2017;9(3). PMID 28245568 (review; B6-dependent enzymes catalyse transsulfuration pathway reactions; confirms B6 as cofactor for homocysteine-to-cysteine conversion via CBS and CSE enzymes)
  3. Clements M, et al. A 2-Year Randomized Controlled Trial With Low-Dose B-Vitamin Supplementation Shows Benefits on Bone Mineral Density in Adults With Lower B12 Status. J Bone Miner Res. 2022;37(12):2443-2455. PMID 36128889 (2-year RCT, n=167; combined B-vitamin supplementation including B6 10 mg/day significantly reduced plasma homocysteine and improved bone mineral density in adults with lower B12 status; confirms B6 as active component of homocysteine-lowering B-vitamin protocols)

Riboflavin (B2)

Full name
Riboflavin (Vitamin B2)
Type
Water-soluble B vitamin / MTHFR cofactor
What it does
Essential cofactor for MTHFR (methylenetetrahydrofolate reductase). The MTHFR TT variant reduces enzyme activity by 70-80%, but adequate riboflavin stabilises whatever residual MTHFR activity remains. Also a cofactor for FAD and FMN in the electron transport chain, and for glutathione reductase (recycling oxidised glutathione).
Benefits
MTHFR enzyme stabilisation, methylation support, energy metabolism, antioxidant recycling (glutathione reductase).
Risks/considerations
Bright yellow urine is normal with B2 supplementation (riboflavin is water-soluble; excess is excreted). Rapidly excreted: split dosing across the day is more effective than single large dose.
Optimal dosing
For migraine prophylaxis: 400 mg/day (RCT-confirmed across multiple trials; see references). For general metabolic and ETC cofactor support: 10-50 mg/day conventional supplementation range (population-level RCT data at this dose range limited). MTHFR TT-specific dosing: see Genetic qualifiers.
Genetic qualifiers
MTHFR TT: riboflavin is the direct cofactor for the impaired enzyme; RCT evidence supports 1.6-10 mg/day to support residual enzyme activity and partially compensate for reduced efficiency (Amenyah 2020: 1.6 mg/day; McAuley 2016 series: up to 10 mg/day).
Found in
Liver, dairy, eggs, almonds, lean meats.
Related
Methylation Cycle · Methylfolate · Glutathione
References
  1. Schoenen J, et al. Effectiveness of high-dose riboflavin in migraine prophylaxis. A randomized controlled trial. Neurology. 1998;50(2):466-470. PMID 9484373 (RCT, n=55; 400 mg/day for 3 months; 59% responder rate vs 15% placebo; migraine prophylaxis indication)
  2. Chen YS, et al. Effect of Vitamin B2 supplementation on migraine prophylaxis: a systematic review and meta-analysis. Nutritional Neuroscience. 2022;25(9):1801-1812. PMID 33779525 (meta-analysis, 9 RCTs, n=673; 400 mg/day significantly reduced migraine days, duration, frequency, and pain score)
  3. Amenyah SD, et al. Riboflavin supplementation alters global and gene-specific DNA methylation in adults with the MTHFR 677 TT genotype. Biochimie. 2020;173:134-142. PMID 32334045 (RCT; 1.6 mg/day in MTHFR TT adults; confirmed riboflavin modulates DNA methylation in TT genotype)
  4. McAuley E, et al. Riboflavin status, MTHFR genotype and blood pressure: current evidence and implications for personalised nutrition. Proceedings of the Nutrition Society. 2016;75(3):405-414. PMID 27170501 (review; 5-13 mmHg SBP reduction with riboflavin in MTHFR 677TT; suboptimal riboflavin status widespread in developed populations)

Selenium

Full name
Selenium (Se)
Type
Trace mineral / antioxidant enzyme cofactor
What it does
Essential cofactor for glutathione peroxidase (GPx4): the primary enzyme that neutralises lipid peroxides, directly preventing ferroptosis. Also required for iodothyronine deiodinase (thyroid hormone activation), thioredoxin reductase (redox balance), and selenoprotein P (selenium transport).
Benefits
Antioxidant defence (glutathione peroxidase), ferroptosis prevention, thyroid function, immune function, cancer risk reduction.
Risks/considerations
Narrow therapeutic window: deficiency and toxicity both cause harm. Selenium glycinate complex is well-absorbed and consistent.
Optimal dosing
55-200 mcg/day. Upper limit 400 mcg/day: do not exceed. Selenomethionine or Se-methylselenocysteine forms preferred.
Genetic qualifiers
GSTP1 GG: selenium-dependent GPx4 is a complementary antioxidant defence alongside the impaired glutathione conjugation pathway.
Found in
Brazil nuts (variable), seafood, organ meats, whole grains.
Related
Glutathione · Ferroptosis · Phase II Detox

Sodium

Full name
Sodium (Na+)
Type
Electrolyte / primary extracellular cation
What it does
Maintains extracellular fluid volume, drives the sodium-potassium pump (essential for nerve conduction and muscle contraction), and regulates blood pressure. LMNT provides 1,000 mg per serving: higher than most electrolyte products, based on research showing athletes and active individuals have higher sodium needs than conservative guidelines suggest.
Benefits
Hydration, nerve function, muscle contraction, fluid balance, performance.
Risks/considerations
Conventional guidelines (2,300 mg/day) are based on sedentary population models. With OMAD and a clean whole-foods diet, sodium from processed foods is minimal: LMNT supplementation ensures adequate intake.
Optimal dosing
1,000-3,000 mg/day from all sources. Whole-food and extended fasting approaches eliminate processed food sodium and require deliberate electrolyte management: supplemental sodium becomes important.
Found in
Salt, seafood, some vegetables.
Related
Potassium · Magnesium

Thiamin (B1)

Full name
Thiamin (Vitamin B1)
Type
Water-soluble B vitamin / carbohydrate metabolism coenzyme
What it does
Coenzyme for pyruvate dehydrogenase (converting pyruvate to acetyl-CoA, linking glycolysis to the TCA cycle), alpha-ketoglutarate dehydrogenase (TCA cycle), and transketolase (pentose phosphate pathway). Essential for glucose metabolism and nerve function.
Benefits
Energy metabolism, nerve function, cognitive function, cardiovascular health.
Risks/considerations
Deficiency (beriberi, Wernicke's encephalopathy) is rare with adequate diet. Well tolerated at standard doses.
Optimal dosing
1.2 mg/day RDA. B complex formulations typically provide 50-250 mg/day; well tolerated at higher doses.
Found in
Pork, whole grains, legumes, nuts.
Related
ATP · Methylation Cycle

Vanadium

Full name
Vanadium (V)
Type
Trace mineral / insulin mimetic
What it does
Mimics insulin action at the cellular level, enhancing glucose uptake independent of insulin receptor activation. May also inhibit phosphatase enzymes that deactivate insulin signalling cascades.
Benefits
Insulin sensitisation, blood glucose regulation, potential thyroid support.
Risks/considerations
At very high doses, vanadium is toxic. Doses at the trace mineral level (up to 100 mcg/day) are well within the safe range.
Optimal dosing
10-100 mcg/day. Typically provided via comprehensive mineral complex. Insulin-mimetic effects are relevant at higher doses; standard supplement levels are primarily for cofactor completeness.
Genetic qualifiers
TCF7L2 TT: insulin sensitising micronutrients are relevant to the 2x T2D risk profile.
Found in
Shellfish, mushrooms, black pepper, parsley.
Related
Chromium · Berberine

Vitamin A

Full name
Retinol / Retinyl Palmitate (preformed Vitamin A)
Type
Fat-soluble vitamin / gene expression regulator
What it does
Preformed Vitamin A (retinol) is essential for vision (especially night vision and dark adaptation), immune function, skin cell differentiation, and gene expression via retinoic acid receptors (RAR). Retinyl palmitate is the storage form: converted to retinol as needed. Declining night vision is an early sign of low vitamin A status.
Benefits
Night vision, immune function, skin health, gene regulation, cell differentiation.
Risks/considerations
Fat-soluble; accumulates in the liver. Toxicity (hypervitaminosis A) is a genuine risk at chronic doses above 10,000 IU/day (3,000 mcg/day). Use a defined endpoint for correction (e.g., night vision normalisation) rather than sustained high dosing. Always stack with K2 and D3 to ensure proper calcium routing.
Optimal dosing
1,500-2,000 mcg RAE/day preformed retinol. This range provides meaningful tissue support well above the prevention-level RDA (900 mcg RAE) while staying within the tolerable upper limit (3,000 mcg RAE/day). Preformed retinol (retinyl palmitate) is required; plant-derived beta-carotene cannot reliably substitute due to variable and genetically impaired conversion efficiency in a significant fraction of the population. Toxicity risk begins at chronic doses above 3,000 mcg RAE/day.
Genetic qualifiers
BCMO1 rs7501331 (A379V) T;T: approximately 32% reduced BCMO1 catalytic activity per affected allele confirmed in human volunteers. T;T homozygous carriers cannot reliably meet vitamin A needs through dietary beta-carotene. Preformed retinol (retinyl palmitate or retinol) is essential; plant-based vitamin A sources are not adequate substitutes. All dosing should use preformed retinol, not beta-carotene.
Found in
Liver (highest), egg yolks, dairy fat, fish. Not from beta-carotene (plant form requires conversion).
Related
Vitamin D3 · Vitamin K2 MK-4
References
  1. Leung WC, et al. Two common single nucleotide polymorphisms in the gene encoding beta-carotene 15,15'-monoxygenase alter beta-carotene metabolism in female volunteers. FASEB J. 2009;23(4):1041-53. PMID 19103647 (human study, female volunteers; rs7501331 A379V alone: -32% beta-carotene conversion; rs12934922 + rs7501331 double variant: -69% conversion; confirms genetic basis of poor converter phenotype)
  2. Lietz G, et al. Single nucleotide polymorphisms upstream from the β-carotene 15,15'-monoxygenase gene influence provitamin A conversion efficiency in female volunteers. J Nutr. 2012;142(1):161S-165S. PMID 22113863 (human study; upstream BCMO1 SNPs reduce catalytic activity 48-59%; also confirms rs7501331 and rs12934922 as coding-region variants with independently validated reduced activity)

Vitamin C

Full name
Ascorbic Acid (Vitamin C)
Type
Water-soluble antioxidant / enzyme cofactor
What it does
Essential cofactor for prolyl hydroxylase and lysyl hydroxylase: the enzymes that hydroxylate proline and lysine residues in collagen, stabilising the triple helix structure. Without adequate Vitamin C, collagen synthesis stalls. Also a powerful water-soluble antioxidant, immune function supporter, and iron absorption enhancer.
Benefits
Collagen synthesis via hydroxylation support, antioxidant, immune function, iron absorption, adrenal support.
Risks/considerations
Water-soluble; excess excreted. Very high doses (>2 g/day long term) can cause GI upset and may affect kidney stone risk in susceptible individuals.
Optimal dosing
500-2,000 mg/day. Divide doses if taking more than 1,000 mg/day as absorption becomes saturating above single doses of approximately 500 mg.
Found in
Bell peppers (highest), citrus, strawberries, broccoli, kiwi.
Related
Collagen Peptides · Glutathione

Vitamin D3

Full name
Cholecalciferol (Vitamin D3)
Type
Fat-soluble hormone precursor
What it does
Converted in the liver to 25-hydroxyvitamin D (25-OHD, storage form) by CYP2R1, then activated in the kidneys to 1,25-dihydroxyvitamin D (calcitriol, active form) by CYP27B1. Acts as a steroid hormone with receptors in nearly every tissue. Regulates calcium absorption, immune function, gene expression (estimated 1,000+ genes), mood, and muscle function. Sun exposure (UVB) produces D3 in skin, most efficiently around midday when the sun is highest.
Benefits
Immune function, bone health, mood, cardiovascular health, cancer risk reduction, muscle function, testosterone support, cognitive function.
Risks/considerations
Common variants in vitamin D hydroxylation and transport can raise the requirement above the population average (see Genetic qualifiers). K2 (MK-4 and MK-7) must be co-supplemented with higher-dose D3 to direct calcium to bone and prevent soft tissue calcification. Target serum 25-OHD: 40-60 ng/mL.
Optimal dosing
2,000-4,000 IU/day. Serum 25(OH)D testing recommended to confirm target range (40-80 ng/mL optimal). Always stack with K2 (MK-4 and MK-7) to direct calcium to bone and away from soft tissue.
Genetic qualifiers
CYP2R1 rs2060793 AG: reduced conversion of D3 to 25-OHD, increases effective requirement; may need 5,000-10,000 IU/day to reach target serum levels. VDR binding protein rs7041 GT: reduced transport efficiency, further increases requirement; stacking CYP2R1 and VDBP impairments may require the upper end of the extended range.
Found in
Fatty fish (salmon, mackerel), egg yolks, liver. Very difficult to achieve therapeutic levels without sun or supplementation.
Related
Vitamin K2 MK-4 · Vitamin K2 MK-7 · Calcium · Vitamin A · Telomeres
References
  1. Grant WB, et al. Vitamin D: Evidence-Based Health Benefits and Recommendations for Population Guidelines. Nutrients. 2025;17(2):244. PMID 39861407 (review; 2,000 IU/day prevents deficiency; 4,000-6,000 IU/day achieves 40-70 ng/mL for broader health protection)
  2. Płudowski P, et al. Clinical Practice in the Prevention, Diagnosis and Treatment of Vitamin D Deficiency: A Central and Eastern European Expert Consensus Statement. Nutrients. 2022;14(7):1483. PMID 35406098 (expert consensus; 800-2,000 IU/day recommended maintenance for adults; target 30-50 ng/mL serum 25(OH)D)
  3. Barry EL, et al. Genetic variants in CYP2R1, CYP24A1, and VDR modify the efficacy of vitamin D3 supplementation for increasing serum 25-hydroxyvitamin D levels in a randomized controlled trial. The Journal of Clinical Endocrinology and Metabolism. 2014;99(7):E1432-8. PMID 25070320 (RCT, n=1787; CYP2R1 rs10766197 significantly modifies 25(OH)D response to D3 supplementation)

Vitamin K1

Full name
Phylloquinone (Vitamin K1)
Type
Fat-soluble vitamin / coagulation cofactor
What it does
The primary form of Vitamin K in plants. Essential for hepatic synthesis of clotting factors (II, VII, IX, X) and anticoagulant proteins (C and S). Less effective than K2 for extrahepatic functions (bone, arterial health).
Benefits
Blood coagulation regulation, anticoagulant protein activation.
Risks/considerations
Interacts with Warfarin (vitamin K antagonist anticoagulant): anyone prescribed warfarin should keep K1 intake consistent, since changes in intake shift its effect. K1 is primarily hepatic in action; K2 handles the extrahepatic work.
Optimal dosing
90-120 mcg/day covers minimum hepatic coagulation requirements (clotting factor carboxylation). Supplemental optimization: 500-1,000 mcg/day. The ECKO trial used 5,000 mcg/day phylloquinone for osteopenia intervention; cardiovascular and bone-protection protocols typically use 500-1,000 mcg/day. K1 is primarily hepatic in its carboxylation work; extrahepatic tissue work (bone, arteries) is handled by K2.
Genetic qualifiers
VKORC1 +2255 (in linkage disequilibrium with rs9923231) T allele: significantly blunted ucOC/iOC response to increasing dietary vitamin K in a cross-sectional study of 548 adults. Only GG-genotype carriers (39% of cohort) showed significant carboxylation improvement with higher K intake; T allele carriers require meaningfully higher K intake to achieve equivalent gamma-carboxylation status. This mechanism applies across all vitamin K forms.
Found in
Leafy greens (kale, spinach, broccoli highest).
Related
Vitamin K2 MK-4 · Vitamin K2 MK-7 · Calcium · Warfarin
References
  1. Nimptsch K, et al. The association between dietary vitamin K intake and serum undercarboxylated osteocalcin is modulated by vitamin K epoxide reductase genotype. Br J Nutr. 2008;101(12):1812-20. PMID 19025725 (cross-sectional, n=548; VKORC1 +2255 polymorphism modulates ucOC/iOC response to dietary K intake; T allele carriers show blunted carboxylation response regardless of K intake level; GG genotype required for significant K-carboxylation dose response)

Vitamin K2 MK-4

Full name
Menaquinone-4 (short-chain Vitamin K2)
Type
Fat-soluble vitamin / tissue-specific K2
What it does
The form of K2 synthesised in tissues from K1 and from GG. Activates MGP (matrix Gla protein) in blood vessels and soft tissues, preventing arterial and soft tissue calcification. Also activates osteocalcin in bone. Has a short half-life (~hours) requiring consistent daily dosing. Concentrated in the brain, where it has roles in sphingolipid synthesis (myelin) and neuroprotection. Some evidence of connection to dream architecture and sleep depth.
Benefits
Arterial calcification prevention, bone mineralisation, brain health (sphingolipid synthesis), potential sleep/dream quality enhancement. MGP activation builds over weeks to months of consistent intake.
Risks/considerations
MK-4 and MK-7 serve complementary but distinct roles: both are needed. MK-4 for fast tissue response (arteries, brain); MK-7 for sustained bone/systemic effects.
Optimal dosing
Standard supplemental range: 1,000-5,000 mcg/day. Clinically studied dose in Japanese menatetrenone trials: 45 mg/day (45,000 mcg) for bone density and gamma-carboxylation outcomes. At nutritional doses below ~500 mcg, MK-4 is not reliably detectable in serum (unlike MK-7), though tissue accumulation may still occur. The 1,000-5,000 mcg supplemental range has limited direct RCT evidence but is mechanistically justified for tissue-level K2 MK-4 activity. Stack with D3 and A.
Genetic qualifiers
VKORC1 rs9923231 (T;T): reduced vitamin K epoxide recycling via VKORC1 enzyme, resulting in blunted gamma-carboxylation response per unit of K intake (Nimptsch 2008). Higher supplemental MK-4 is required for adequate MGP and osteocalcin carboxylation. For VKORC1 T;T carriers, 1,500+ mcg/day is a suggested minimum, above the range where serum MK-4 is essentially undetectable (Sato 2012); the pharmacological dose used in Japanese trials (45 mg/day) is a prescription drug in Japan and is not available as a supplement in every country. Important safety note: VKORC1 T;T also confers ~50% reduced Warfarin sensitivity: if warfarin is ever prescribed, dose adjustments are critical.
Found in
Natto (MK-7 primarily), fermented foods, grass-fed dairy, egg yolks. Endogenous synthesis from K1 via tissue enzymes.
Related
Vitamin K2 MK-7 · Vitamin K1 · Vitamin D3 · Calcium · GG · Eannatto · Warfarin
References
  1. Sato T, et al. Comparison of menaquinone-4 and menaquinone-7 bioavailability in healthy women. Nutr J. 2012;11:93. PMID 23140417 (bioavailability RCT; MK-4 at 60-420 mcg/day not detectable in serum; MK-7 at same doses significantly increased serum levels; fundamental mechanistic distinction between the two isoforms)
  2. Jiang Y, et al. Menatetrenone versus alfacalcidol in postmenopausal osteoporosis: a multicenter, randomized, double-blinded trial. Clin Interv Aging. 2014;9:121-7. PMID 24426779 (RCT, n=236; 45 mg/day MK-4 for 1 year; BMD increased at lumbar spine and trochanter; ucOC reduced 82.3%; Gla-OC increased; noninferior to alfacalcidol for fracture prevention)
  3. Shiraki M, Itabashi A. Short-term menatetrenone therapy increases gamma-carboxylation of osteocalcin with a moderate increase of bone turnover in postmenopausal osteoporosis. J Bone Miner Metab. 2009;27(3):333-40. PMID 19172219 (RCT, n=109; 45 mg/day MK-4 for 6 months; ucOC significantly reduced from month 1; Gla-OC increased; demonstrates rapid carboxylation effect at pharmacological dose)
  4. Nimptsch K, et al. PMID 19025725 (VKORC1 genotype modulates dietary K carboxylation response; T allele blunts ucOC reduction with increasing K intake; see Vitamin K1 References for full citation)

Vitamin K2 MK-7

Full name
Menaquinone-7 (long-chain Vitamin K2)
Type
Fat-soluble vitamin / bone and systemic K2
What it does
The long-chain form of K2, primarily from fermented foods (especially natto). Long half-life (days) provides sustained systemic activity. Activates osteocalcin (bone mineralisation) and MGP throughout the body. Superior to MK-4 for bone density outcomes; complementary to MK-4 rather than a substitute.
Benefits
Bone density, arterial health, systemic MGP activation, cardiovascular protection. Complementary to MK-4 in a complete K2 strategy.
Risks/considerations
Natto is the richest dietary source but is unavailable/unappealing in most Western contexts. Supplemental MK-7 (all-trans form) is the standard intervention. Take with fat for absorption.
Optimal dosing
180-360 mcg/day. RCT benchmark: 180 mcg/day for 3 years (Knapen 2013, n=244) significantly attenuated age-related BMD decline at lumbar spine and femoral neck. 90 mcg/day showed femoral neck BMD preservation in Chinese postmenopausal women (Zhang 2020). MK-7 is detectable in serum at doses from 60 mcg upward (unlike MK-4), providing reliable systemic bioavailability at standard supplemental doses. Stack with D3.
Genetic qualifiers
VKORC1 rs9923231 (T;T): same reduced K recycling mechanism as applies to K1 and MK-4 (see Nimptsch 2008). VKORC1 T;T carriers require higher K2 intake for equivalent gamma-carboxylation of osteocalcin and MGP. For VKORC1 T;T, the upper end of the range (360 mcg/day) is preferred.
Found in
Natto (highest by far), some fermented cheeses, grass-fed dairy.
Related
Vitamin K2 MK-4 · Vitamin K1 · Vitamin D3 · Calcium
References
  1. Knapen MHJ, et al. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporos Int. 2013;24(9):2499-507. PMID 23525894 (RCT, n=244; 180 mcg/day MK-7 for 3 years; significantly attenuated age-related BMD decline at lumbar spine and femoral neck; bone strength improved; benchmark MK-7 supplementation trial)
  2. Zhang Y, et al. Effect of low-dose vitamin K2 supplementation on bone mineral density in middle-aged and elderly Chinese. Calcif Tissue Int. 2020;106(5):476-485. PMID 32060566 (RCT, n=311; 90 mcg/day MK-7 for 1 year; significant bone loss reduction at femoral neck in postmenopausal women; establishes lower effective dose boundary)
  3. Sato T, et al. Comparison of menaquinone-4 and menaquinone-7 bioavailability in healthy women. Nutr J. 2012;11:93. PMID 23140417 (bioavailability RCT; MK-7 detectable and sustained in serum at 60-420 mcg; daily dosing produces stable serum levels; contrast with MK-4 non-detectability at nutritional doses)
  4. Nimptsch K, et al. PMID 19025725 (VKORC1 genotype modulates K carboxylation response; applies to MK-7 as long-chain K2; see Vitamin K1 References for full citation)

Zinc

Full name
Zinc (Zn2+)
Type
Essential trace mineral / enzymatic cofactor
What it does
Cofactor for over 300 enzymes including DNA polymerase, RNA polymerase, superoxide dismutase (Cu/Zn-SOD), and numerous immune enzymes. Essential for testosterone synthesis, immune function, wound healing, taste and smell, and protein synthesis. The bisglycinate chelate form has superior absorption.
Benefits
Immune function, testosterone support, antioxidant enzyme activity, wound healing, cognitive function, protein synthesis.
Risks/considerations
Zinc:copper ratio must be maintained: zinc competes with copper for absorption. A 10:1 ratio (e.g. 20 mg zinc : 2 mg copper) is appropriate for daily maintenance. Very high zinc (>40 mg/day) causes copper deficiency. Do not supplement zinc without adequate copper.
Optimal dosing
8-25 mg/day. Maintain zinc:copper ratio at approximately 10:1 or lower. Picolinate or bisglycinate forms preferred for bioavailability.
Found in
Oysters (highest), beef, pumpkin seeds, hemp seeds, legumes.
Related
Copper · Glutathione · Chelation
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