Dietary Supplement Supports Serotonin Synthesis* 5-Hydroxytryptophan Jarrow Formulas® 5-HTP is an extract of Griffonia simplicifolia seeds from coastal West Africa and is verified to be free of the "peak X" contaminant. Purity is assured by HPLC. 5-HTP is the direct metabolic precursor of serotonin and is important for the production of melatonin. No wheat, no gluten, no soybeans, no dairy, no egg, no fish/shellfish, no peanuts/tree nuts. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.