About this item Melatonin Production - 5-HTP is the direct metabolic precursor to serotonin and is important for the production of melatonin, a hormone secreted by the pineal gland that aids biorhythm regulation. Mental Health & Sleep - 5-HTP may be useful in promoting mental health (as a precursor to serotonin) and sleep (as a precursor to melatonin). Serotonin Synthesis - 5-HTP (5-hydroxytryptophan) is an extract of griffonia simplicifolia seeds from coastal West Africa. Purity is assured by HPLC. The formula supports serotonin synthesis. Convenient Veggie Caps - Take one capsule per day on an empty stomach or as directed by your qualified healthcare professional. Superior Nutrition & Formulation - The goal of Jarrow Formulas is to promote optimal health with high-quality, effective, affordable, and superior formulation of dietary supplements. Our customers can be assured of purity, value, and potency.