Source Naturals, L Tryptophan, 500mg Serene Science Label, 60 ct

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 peroids. 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 capsSuggested Use1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed.IngredientsIron (naturally occurring), 575 mcgL-Tryptophan, 1.5 gOther Ingredients: gelatin (cap), dibasic calcium phosphate, microcrystalline cellulose, silica, and magnesium stearate.About Source