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Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial

S Hidese, S Ogawa, M Ota, I Ishida, Z Yasukawa, M Ozeki et al.. Nutrients. 2019.

Published 2026-10-15Sources checked 2026-10-151 sourceEverstack research teamHow we work

In plain language

Four weeks of L-theanine improved stress-related symptoms and sleep scores in healthy adults.

Limits

Small sample, self-reported outcomes.

Source

doi.org/10.3390/nu11102362 · PubMed 31623400 · Free full text

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