Acute effects of combined and isolated caffeine and theanine supplementation on physical and cognitive performance in competitive athletes: a randomized, double-blind, placebo-controlled crossover study.

Front Nutr · 2025 · PMC12884062 · PMID 41668720

Europe PMC DOI

hedged sentence

0.2230

closest p · 4.5× alpha

0.2230

boldest claim

The sentences

did not reach statistical significancep = 0.223not close (p > 0.1)

Acute administration of 200 mg L-theanine also did not reach statistical significance on the Yo-Yo Intermittent Endurance Test ( p = 0.223).

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