Research library / Sleep

L-Theanine reduces psychological and physiological stress responses

K Kimura, M Ozeki, LR Juneja, H Ohira. Biological Psychology. 2007.

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

In plain language

L-theanine blunted heart rate and salivary IgA responses to a mental arithmetic stress task versus placebo.

Limits

12 people; single lab session; surrogate stress markers.

Source

doi.org/10.1016/j.biopsycho.2006.06.006 · PubMed 16930802

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