The essential amino acid l-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and sleep/wake cycles. l-Tryptophan also supports immune functions because it is the body’s precursor 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.

Supplement Facts for Capsule Serving Size: 3 Capsules Amount %DV Iron (naturally occurring) 600 mcg 3% L-Tryptophan (25 mg naicin equivalents) 1.5 g Suggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed. Other Ingredients: gelatin (capsule), silica, magnesium stearate, dibasic calcium phosphate, and microcrystalline cellulose.