L-Theanine and Reduced Simple Reaction Time

• Promising, but Not Completely Conclusive-The Effect of l-Theanine on Cognitive Performance Based on the Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Clinical Trials.

  • 2025-10-30
  • Review
  • Journal of clinical medicine 14(21)
  • • Rebeka Olga Mátyus
    • Zsóka Szikora
    • Diána Bodó
    • Bettina Vargáné Szabó
    • Éva Csupor
    • Dezső Csupor
    • Barbara Tóth

  • PubMed: 41227106
  • DOI: 10.3390/jcm14217710

  3 Insights on

  • Reduced Simple Reaction Time

  • Low evidence
  • Adults

  The effects of l-theanine were non-significant on reaction time to a simple stimulus (MD: -0.46 ms; 95% [CI: -15.65; 14.73])

  Effect

  Neutral

  Effect size

  Small

  Significant

  No