Supports Relaxation Positive Mood & Sleep. Suitable for Vegetarians. Jarrow Formulas® L-Tryptophan Peptide uses PepForm® technology. . L-tryptophan is an essential amino acid and must be obtained from food or supplements. L-tryptophan is metabolized to serotonin (5-hydroxytryptamine) and melatonin which is important for relaxation restful sleep and positive mood.
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