Taurine and endurance performance: grade B

A 2018 meta-analysis of 10 studies of isolated oral taurine found improved endurance performance (Hedges' g = 0.40), with no difference between single doses and courses of up to 2 weeks. A 2025 meta-analysis of 23 randomized trials with 308 participants found a smaller overall performance effect (g = 0.25, I2 = 61%) and rated certainty low to very low, with prediction intervals that often included no effect. Ref 2's endurance signal is a moderator result, and the authors report that several subgroup effects weakened after influential studies were excluded. B is kept because ref 1 is an endurance-specific meta-analysis of isolated taurine with a confidence interval that excludes no effect, and ref 2's pooled estimate points the same way (G2); the low certainty is stated on the page. Trials used single doses or courses of up to 2 weeks, so the short-term modifier applies. Funding for both meta-analyses is not stated.

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