Quick Answer
Use iHerb discount code KHQ339 at checkout.
Sleep Support500 mg Per CapsuleDietary SupplementEncourages Healthy Sleep PatternsHelps Regulate the Body's Circadian RhythmSupports Healthy Serotonin LevelsScience-Backed Quality Since 1969Looking for effective sleep support? Swanson L-Tryptophan offers 500 mg of L-tryptophan per capsule to help support healthy serotonin levels and provide restful sleep. L-tryptophan an essential amino acid has to be obtained in the diet or in supplement form. Extensive lot tests indicate no Peak-E in this product.