L-Taurine · 2-Aminoethanesulfonic Acid
Taurine (2-aminoethanesulfonic acid) is a sulfur-containing amino acid derivative synthesized endogenously from cysteine and methionine. Unlike typical amino acids, taurine is a non-proteinogenic amino acid - it is not incorporated into proteins but instead functions as a free amino acid in high concentrations throughout the body. Taurine is the most abundant free amino acid in excitable tissues: the heart (~50% of total free amino acid pool), retina, brain, skeletal muscle, and leukocytes.
Can be taken with or without food. Evening dosing supports sleep/HRV. Pre-workout 1-2 hours before exercise for performance. Split dosing (AM + PM) maintains steadier levels. Taurine powder dissolves easily in water.
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
Taurine's cardiac effects are mediated through multiple mechanisms: it modulates calcium handling in cardiomyocytes (both uptake and efflux via the Na+/Ca2+ exchanger), stabilizes membrane potential, enhances mitochondrial function, and protects against ischemia-reperfusion injury. Taurine deficiency causes cardiomyopathy in cats (who cannot synthesize it) and contributes to heart failure progression in humans.
Taurine conjugates to cholesterol-derived bile acids (forming taurocholate), facilitating fat and fat-soluble vitamin absorption. This bile conjugation is a major endogenous consumption pathway for taurine and explains why cholestatic conditions can deplete body stores.
In the nervous system, taurine acts as a partial agonist at GABA-A and glycine receptors, providing inhibitory neurotransmission and calming effects. It also regulates intracellular calcium in neurons and provides osmoregulation (taurine efflux during cell swelling).
Taurine is a potent antioxidant, scavenging hypochlorous acid (produced by neutrophil myeloperoxidase) and reducing oxidative damage. It also improves insulin signaling and glucose uptake via GLUT4 translocation, supporting metabolic health.
The Columbia 2023 findings (Singh et al. in Science) showed taurine levels decline dramatically with age in mice, monkeys, and humans, and restoring taurine via supplementation extends mouse lifespan ~10-12% and improves markers of aging (bone density, muscle strength, cognitive function).
Days 1-14: HRV improvements, sleep quality, exercise performance.
Each reference below was re-fetched from its PubMed record, and the quoted sentence was confirmed to appear in that abstract and to support the claim it sits under. Follow any of them to read the source.
Exact-molecule evidence boundary: the live abstract reports the quoted finding for Taurine; no broader inference is made.
We find that concentrations of circulating taurine decline with aging in mice, monkeys, and humans.
Taurine deficiency as a driver of aging.
Evidence scope. Exact molecule wording appears in the quoted live sentence. Only the population/model, formulation, route, and outcome expressly stated there are supported.
Claims we could not support
No abstract we checked supports these for this molecule at this route. That is not the same as saying they are false — it marks where the evidence is missing.
Dose/route: 1-3g daily; Oral; 1-2x daily. No selected live abstract sentence verified this complete regimen.
Mechanism as written in source JSON. No selected live abstract sentence verified the complete mechanism at the card formulation/route and relevant population/model.
Primary safety claim as written in source JSON. No selected live abstract sentence verified the complete safety claim for this exact formulation and route.
Two different questions: what is documented about running these together, and what is documented about drawing them into the same syringe. A good pharmacological partner can still have to be pinned separately.
Check any specific pair in the Stack & Interaction Checker, which answers both questions separately. Absence of a documented conflict is not evidence of safety.
Plasma (rapid tissue distribution). Tissue half-life much longer.
Oral.
Plasma clearance 4-8 hours. Tissue stores slowly turn over (weeks-months).
+ oral absorption. Taurine is actively transported by specific taurine transporters (TauT, PAT1) in the gut.
Acute cardiovascular/performance effects 4-8 hours per dose. Chronic tissue repletion and aging/longevity effects build over weeks-months of consistent dosing.
Renal excretion of excess; hepatic conjugation with bile acids (taurocholate) is a major consumption pathway.
Storage. Store at room temperature (20-25C) in a cool, dry place. Protect from moisture. Powder is hygroscopic - keep container tightly closed. Capsules shelf-stable 2+ years.
Classified as a dietary supplement in the US - no prescription required. Widely available in capsules, powder, and as an ingredient in energy drinks. Not FDA-approved for any medical indication. Japanese approved dietary supplement with long safety history.
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Open Taurine straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
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