Taurine

Your intake

What each level of taurine does

Approximate dose-response bands. Individual response varies — these are starting points, not prescriptions.

1. Severely lowYOU ARE HERE

   0 mg – 495 mg

   Well below target. Risk of deficiency symptoms tied to cardio · electrolyte.

2. Insufficient

   495 mg – 1500 mg

   Below the recommended daily target. Long-term adequacy not assured.

3. Adequate

   1500 mg – 2250 mg

   Daily target met. Standard nutritional support for cardio · electrolyte.

4. Therapeutic

   2250 mg – 3000 mg

   Common for specific health goals. Check the evidence for your situation before sustaining this level.

5. Diminishing returns

   3000 mg – +

   Past the point where extra intake typically helps. Evidence for further benefit is thin.

Overview

Conditionally essential sulfur amino acid (not used in protein synthesis). Among the most abundant intracellular free amino acids — concentrated in heart, brain, retina, muscle. Roles in osmoregulation, calcium signalling, bile acid conjugation, and membrane stability. Recent (2023) data suggest blood taurine declines with age and supplementation extends lifespan in mice — but the human picture is still developing.

Functions

• ●Osmoregulation (cellular volume control)
• ●Conjugates bile acids (taurocholate)
• ●Modulates calcium signalling in heart and brain
• ●Stabilises mitochondrial tRNA and complex IV
• ●Inhibitory neuromodulator (GABA-like)
• ●Antioxidant role in inflammatory tissues

Mechanism

Acts as a 'thermodynamic stabiliser' — its negative charge and small size let it occupy cytoplasm without disrupting protein function, supporting cell volume during osmotic stress. Mitochondrial tRNA taurine modification is required for normal translation of complex I and complex IV subunits — its loss is the proximate cause of MELAS-like mitochondrial dysfunction in taurine-deficient cats and mice.

Benefits

• ●Required dietary nutrient for cats (cardiomyopathy if deficient)
• ●Reduces oxidative stress markers in resistance-trained athletes
• ●May modestly improve heart failure outcomes (small trials)
• ●Possible role in retinal and bile-acid function with TPN
• ●Singh 2023 — lifespan extension in mice, monkeys; human trials pending

Deficiency

Spontaneous human deficiency is rare. Strict vegan diets, premature infants, and TPN without taurine can produce inadequacy.

Excess

No established UL. Well-tolerated to ~3 g/day. Energy-drink-related concerns are usually about caffeine, not taurine.

Forms

• L-taurine powder
  Standard form; affordable; mildly sweet
• L-taurine capsules
  Convenient at 500–1,000 mg/day
• Magnesium taurate
  Two-for-one if you want both — popular in cardio protocols

Food sources

• Scallops (cooked) · 3 oz830 mg
• Mussels (cooked) · 3 oz655 mg
• Cooked turkey · 3 oz300 mg
• Cooked beef · 3 oz60 mg
• Cooked salmon · 3 oz130 mg

Supplement forms

L-taurine powder or capsules at 1–3 g/day is the conventional range. Well-tolerated; no UL established. The recent longevity data used 1 g/kg/day in mice — human-equivalent dose calculations vary; most human trials use 1–3 g/day.

Bioavailability

Active transport via TauT/SLC6A6; oral bioavailability ~80%. Plasma peaks ~1.5 h post-dose; tissue uptake is slower and continues for hours. Endogenous synthesis from methionine/cysteine is modest in adults.

Longevity relevance

Singh et al. 2023 (Science) — taurine supplementation extended lifespan and healthspan in mice, monkeys, and worms; cross-sectional human data showed taurine decline with age correlating with several aging markers. First major prospective human trial is ongoing — results not yet definitive but the molecule is now central to several aging-research programs.

Relationships

References

• Examine — Taurinereview
• Singh — Taurine deficiency as a driver of aging (Science 2023)study
• EFSA — taurine safety in energy drinks (2009)review

About Taurine

Conditionally essential; cardiovascular, mitochondrial, osmoregulation. Common dose 1–3 g/day.

Role

Cardio · electrolyte

Daily target

1500 mg (TR)

Also called

taurine, l-taurine