L-Tryptophan and Improved Mood

• A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning.

  • 2020-04-10
  • Systematic Review
  • Journal of dietary supplements 18(3)
  • • Asako M Kikuchi
    • Aya Tanabe
    • Yoshihiro Iwahori

  • PubMed: 32272859
  • DOI: 10.1080/19390211.2020.1746725

  3 Insights on

  • Improved Mood

  • High evidence
  • Adults

  Four RCTs showed the effects of tryptophan intake on negative feelings and happy feelings in healthy individuals, with significant differences between the treatment and the control groups. This suggests that TRP intake may be an effective approach to decrease anxiety and increase positive mood in healthy individuals.

  Effect

  Beneficial

  Effect size

  Moderate

  Significant

  Yes

  Dose

  0.14-3 g/day