Also known as: 2-aminoethanesulfonic acid, taurin
A 2023 Science paper made it the longevity molecule of the year, on the strength of mice — the human evidence is a decade behind the enthusiasm.
The headline ageing evidence is animal work plus human observational association. Human trials are limited to small performance and cardiometabolic studies with modest, inconsistent effects. It is safe and cheap, which is most of its current appeal.
In June 2023 a paper in *Science* reported that taurine levels decline with age across mice, monkeys, and humans, and that restoring them in middle-aged mice extended median lifespan by roughly 10-12% while improving bone density, muscle strength, and immune function. It was rigorous, multi-species work, and it made taurine briefly the most talked-about molecule in longevity.
It is worth being precise about what that paper did and did not show. The lifespan extension was in mice. The monkey work was six months of biomarkers, not survival. The human component was observational: people with lower taurine had worse metabolic health, which is an association that could run in either direction and probably partly does — illness lowers taurine.
The human intervention literature is much older and much smaller. Exercise trials, pooled in a 2018 meta-analysis, show a small endurance benefit at 1-3 g. Cardiovascular trials report modest blood-pressure reductions. There is decent evidence in heart failure from Japanese work, where taurine has been used clinically for decades. None of it addresses ageing.
A few things count in taurine's favour anyway. It is remarkably safe — a genuinely non-toxic compound with a long history of use, including as the ingredient energy drinks are named after, where it does approximately nothing (that is the caffeine). It is cheap. And cats, who cannot synthesise it, go blind and develop cardiomyopathy without it, which is a vivid demonstration that the molecule matters.
The interesting question that will not resolve for years is whether the mouse result translates. Rodent lifespan studies have an unhappy history in this exact domain: resveratrol had a comparable moment, and human trials went nowhere. A properly powered human trial of taurine in ageing has not been run, and running one honestly takes a decade.
At 1-3 g daily it is inexpensive and safe enough that trying it costs little. Just hold the expectation at the right level — this is a promising hypothesis, not a demonstrated intervention.
Taurine is a conditionally essential amino sulphonic acid concentrated in heart, muscle, retina, and brain. It stabilises membranes, regulates intracellular calcium handling, conjugates bile acids, acts as a cytoprotective osmolyte, and modulates GABA-A and glycine receptors — a broad, non-specific set of roles that makes both its effects and its claims hard to pin down.
Short-term studies suggest good tolerability at gram doses, but a formal safe upper limit has not been established and long-term supplementation is less well studied. Energy drinks contain taurine, but their major established risks come from caffeine and sugar. High chronic doses may compete with beta-alanine for cellular transport.
This guide is educational, not medical advice. Talk to a physician or pharmacist before starting any supplement, especially alongside prescription medication or a medical condition.
Evidence review last updated