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Evidence-Based Supplement Research

Evidence-Based Supplement Research

L-Theanine and Reduced Depression Symptoms

Doses used in studies

mg/day: 200 (median 200, IQR 200–200) — 1 study

Time to effect

Median: 4 weeks · IQR 4 weeks–4 weeks · Range 4 weeks–4 weeks — Reported in 1 of 1 study

1 of 1 paper

Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial.
- 2019-10-03
- RCT · n = 30
- Nutrients 11(10)
- - Shinsuke Hidese
  - Shintaro Ogawa
  - Miho Ota
  - Ikki Ishida
  - Zenta Yasukawa
  - Makoto Ozeki
  - Hiroshi Kunugi
- PubMed: 31623400
- DOI: 10.3390/nu11102362
8 Insights on
- Reduced Depression Symptoms
- High evidence
- Rigorous Journal
- Adults
Self-rating Depression Scale ... scores decreased after L-theanine administration (p = 0.019)
Effect
Beneficial
Effect size
Moderate
Significant
Yes
Dose
200 mg/day