About this item Support Sleep 5-HTP (5-hydroxytryptophan) is an extract of Griffonia simplicifolia seeds from coastal West Africa. Purity is assured by HPLC. 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