L-Tryptophan - Glossary


An essential amino acid and precursor to serotonin (neurotransmitter), melatonin (hormone) and niacin (vitamin). High protein foods such as poultry (especially turkey), soy, eggs and fish are good sources of tryptophan.  Tryptophan supplements are used to promote relaxation and sleep, although this has yet to be validated by the appropriate clinical studies.

Author: elissa

Elissa is a former research associate with the University of California at Davis, and the author/co-author of over a dozen articles published in scientific journals. Currently a freelance writer and researcher, Elissa brings her multidisciplinary education and training to her writing on nutrition and supplements.

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