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Evidence-Based Supplement Research

Evidence-Based Supplement Research

L-Theanine and Reduced P3b Amplitude

Doses used in studies

mg/day: 100–400 (median 250, IQR 100–400) — 1 study

Safety in these studies

Overall tolerabilityReported
L-theanine, a non-proteinic amino acid found in tea, is known to enhance attention particularly in high doses, with no reported adverse effects.
from: L-theanine improves neurophysiological measures of attention in a dose-dependent manner: a

1 of 1 paper

L-theanine improves neurophysiological measures of attention in a dose-dependent manner: a double-blind, placebo-controlled, crossover study.
- 2020-08-11
- RCT
- Nutritional neuroscience 25(4)
- - Tharaka L Dassanayake
  - Chanaka N Kahathuduwa
  - Vajira S Weerasinghe
- PubMed: 32777998
- DOI: 10.1080/1028415x.2020.1804098
4 Insights on
- Reduced P3b Amplitude
- High evidence
- Adults
No dose-response effect was observed in P3b amplitude, pre-attentive ERP components or reaction time.
Effect
Neutral
Effect size
Small
Significant
No
Dose
100, 200 and 400 mg