Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Nutr Rev · 2025 · PMC12422004 · PMID 40314930

Europe PMC DOI

hedged sentence

0.0580

closest p · 1.2× alpha

0.0580

boldest claim

The sentences

did not reach statistical significanceP = .058so close (0.05 < p ≤ 0.1)

65 The number of minutes spent awake after the initial onset of sleep (wakefulness after sleep onset) tended to be improved (reduced) by the theanine treatment, but this effect did not reach statistical significance ( P = .058).

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