L-Tryptophan
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At PersonaPath
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Pairs perfectly with L-Tyrosine to support a calmer, more restful night routine
Official Health Claims
All health claims on this page are approved by the European Food Safety Authority (EFSA) and comply with the Danish Veterinary and Food Administration (Fødevarestyrelsen) regulations.*
Below, you’ll find only official, permitted health claims, nothing exaggerated, nothing misleading. Just clear, science-backed information to help you make informed decisions about your health.
Evidence that Matters
We focus on nutrients backed by solid research and stay up to date with the latest science.
Here are a few studies that show why we choose them that you might find interesting.
A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
Gifu University of Medical Science, Japan
L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications
University of Texas Health Science Center at San Antonio
Analysis, Nutrition, and Health Benefits of Tryptophan
United States Department of Agriculture (USDA)
The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression
National University of Singapore
Effects of L-tryptophan on sleepiness and on sleep
Tufts University, Medford, MA, USA.
Association between consumption of tryptophan with sleep quality in King Saud University students
King Saud University (Saudi Arabia)
How Safe and Effective Is Tryptophan in Improving Sleep in Healthy Individuals With Mild Sleep Disorders?
Philadelphia College of Osteopathic Medicine (PCOM), USA
EFFECTS OF L-TRYPTOPHAN (A NATURAL SEDATIVE) ON HUMAN SLEEP
The Lancet - Medical Journal
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There are currently 6,312 published studies on L-Tryptophan
We continually assess new findings to ensure our approach stays grounded in the latest science
Numbers as of 2025
Find what suits you
If you need a little help, take our online health assessment to see what we recommend