Source Naturals, L Tryptophan, 500mg, 60 tabs

The essential amino acid L-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of hormones involved with mood and stress response and sleep/wake cycles. L-Tryptophan also supports immune functions because it is the body's predecessor to the kynurenines that regulate immunity. If needed, L-tryptophan 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 system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.Packaging60 tabsSuggested Use1 tablet three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 tablets before bed.IngredientsMangosteen Fruit Rind Extract - 187.5 mg(XanoMax(tm) standardized to 95% flavonoids and 40% mangostins providing 75 mg of xanthones as mangostins). -Calcium - 52 mgIron (naturally occurring)