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Evidence-Based Supplement Research

Evidence-Based Supplement Research

L-Theanine and Reduced Insomnia

Doses used in studies

mg/day: 450–900 (median 675, IQR 450–900) — 1 study

Time to effect

Median: 10 weeks · IQR 10 weeks–10 weeks · Range 10 weeks–10 weeks — Reported in 1 of 1 study

1 of 1 paper

L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial.
- 2019-03
- RCT · n = 46
- Journal of psychiatric research 110
- - Jerome Sarris
  - Gerard J Byrne
  - Lachlan Cribb
  - Georgina Oliver
  - Jenifer Murphy
  - Patricia Macdonald
  - Sonia Nazareth
  - Diana Karamacoska
  - Samantha Galea
  - Anika Short
  - Carolyn Ee
  - Yoann Birling
  - Ranjit Menon
  - Chee H Ng
- PubMed: 30580081
- DOI: 10.1016/j.jpsychires.2018.12.014
7 Insights on
- Reduced Insomnia
- High evidence
- Clinical
a separation in favour of L-theanine was noted on the ISI in those with non-clinical levels of insomnia symptoms (ISI ≤ 14; p = 0.007)
Effect
Beneficial
Effect size
Small
Significant
Yes
Dose
450-900 mg