Research library / Sleep

L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial

J Sarris, GJ Byrne, L Cribb, G Oliver, J Murphy, P Macdonald et al.. Journal of Psychiatric Research. 2019.

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

In plain language

Adjunctive L-theanine 450 to 900 mg a day did not beat placebo for anxiety or insomnia severity; one sleep satisfaction item favored it.

Limits

Small trial in a disorder population; mostly null.

Source

doi.org/10.1016/j.jpsychires.2018.12.014 · PubMed 30580081

Summary written by Everstack from the published abstract. Verified against Crossref on 2026-10-15. The authors do not endorse Everstack.