An essential amino acid that helps support mood, relaxation, and restful sleepPlays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress responseAlso supports immune functions, as the body's precursor to the kynurenines that regulate immunityIf needed, converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive systemExtremely pure and regularly tested to ensure the highest standards of quality
L-Tryptophan is an amino acid.
Brand: Source Naturals, Model: SN1985, Size: 120 Capsules