Taurine
A small endurance effect. The longevity claim is animals only.
Grade B: Some human proof
Small, early or mixed results in people.
The grade is for the use people talk about, not for every use. Filed under: Gym supplements.
How it works
An amino-acid-like compound found in muscle, heart and brain.
How it was given in studies
By mouth. In the trials people swallowed it as a capsule, tablet, powder or drink.
This is what the studies did. It is not a how-to.
What studies saw
A 2025 review of 23 trials in 308 people found a small endurance benefit, with low certainty. The life-extension result comes from mice, worms and monkeys.
The trade-off
A 2025 study of three groups of people found taurine levels do not reliably fall with age.
When it showed up, in studies
The endurance effect showed up after single servings, and after up to 2 weeks of use.
Sources
Put this grade on your site
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Keep going
We show what studies found. We never tell you what to take. Doses vary by study. Check the sources and talk to a doctor.