Taurine and Heart Health: Emerging Evidence
Taurine is an amino acid that the body concentrates in the heart and muscle, where it supports calcium handling, antioxidant defense, and cell-volume control; because most of it comes from meat and seafood, vegans tend to run lower. The headline evidence is a 2023 Science study showing taurine levels fall about 80% with age and that supplementation extended mouse lifespan by roughly 10–12% while improving markers of aging — but the authors stressed that human randomized trials are still needed. For the heart specifically, the human evidence is genuinely emerging rather than settled, with a modest blood-pressure reduction being the most testable signal so far. The honest read is that taurine is a promising, low-risk amino acid whose cardiovascular and longevity claims have outpaced the controlled human data, so food sources and realistic expectations are the sensible starting point.
The 2023 Science Landmark Study
Singh et al. 2023 (PMID 37289866), published in Science (not Nature Aging, as is sometimes reported), measured taurine across the human lifespan and found about an 80% drop between young adulthood and old age, with similar declines in mice and monkeys. In mice, taurine supplementation extended median lifespan by roughly 10–12% and improved several markers of biological aging — bone density, muscle function, immune cell composition, and DNA damage. The human observational arm showed lower taurine correlated with multiple age-related diseases. The authors emphasized that randomized clinical trials are needed before drawing causal conclusions in humans.
Current state of the cardiovascular evidence
Cardiovascular Evidence
The cardiovascular evidence for taurine pre-dates the 2023 lifespan paper and is more solid. Waldron et al. 2018 (Curr Hypertens Rep, PMID 30006901), a meta-analysis of 7 RCTs in 103 participants, found taurine at doses of 1–6 g/day for periods ranging from 1 day to 12 weeks reduced both systolic and diastolic blood pressure by approximately 3 mmHg on average (range 0–15 mmHg systolic, 0–7 mmHg diastolic), with no adverse events reported. A Japanese epidemiological study (Yamori 2010, J Biomed Sci) found inverse associations between dietary taurine intake and cardiovascular mortality, which has been cited as one of several explanations for Japan's relatively low rate of coronary disease.
Safety and Considerations
Taurine has a strong safety profile. The European Food Safety Authority's 2009 opinion on taurine in energy drinks concluded that exposure to taurine at the doses found in those products (around 0.06 g/kg body weight per day, or about 4 g/day for a 70-kg adult) was unlikely to raise safety concerns. EFSA's earlier Scientific Committee on Food set a no-observed-adverse-effect level of 1,000 mg/kg/day in animal studies. Energy drinks contain taurine at about 1–2 g per can — their stimulant effects are from caffeine, not taurine. At 1–3 g/day, taurine is a low-cost supplement with real emerging evidence on blood pressure and cardiac function, though the longevity claim still needs confirmation by adequately powered human RCTs.
Sources
- Singh P, et al. “Taurine deficiency as a driver of aging.” Science, 2023. PMID 37289866.
- Waldron M, et al. “The effects of oral taurine on resting blood pressure in humans: a meta-analysis.” Curr Hypertens Rep, 2018. PMID 30006901.
- Yamori Y, et al. “Taurine in health and diseases: consistent evidence from experimental and epidemiological studies.” J Biomed Sci, 2010. PMID 20804626.
- EFSA Panel on Food Additives and Nutrient Sources Added to Food (ANS). “The use of taurine and D-glucurono-gamma-lactone as constituents of the so-called ‘energy’ drinks.” EFSA Journal, 2009.
- Murakami S. “Taurine and atherosclerosis.” Amino Acids, 2014. PMID 23922072 (mechanistic review).