"Jarrow Formulas 5-HTP (5-Hydroxytryptophan) is an extract of Griffonia simplicifolia seeds from coastal West Africa. Purity is assured by HPLC. 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."Dietary Considerations Wheat Free Dairy/ Milk Free Gluten Free Vegetarian Soy Free Vegan Egg Free Shellfish Free Non-GMO Fish Free Tree Nut Free Peanut Free NSF Certified Suggested UseTake 1 capsule per day on an empty stomach or as directed by your qualified healthcare professional.Serving Size:1 Capsule Servings Per Container: 60 Amount Per Serving 5-HTP (5-Hydroxytryptophan) (from Griffonia simplicifolia) (Seed) Other Ingredientsmicrocrystalline cellulose, capsule (hydroxypropylmethylcellulose, water), magnesium stearate (vegetable source), silicon dioxideWarnings If you have a medical condition, are pregnant, lactating, trying to conceive, under the age of 18, or taking medications (especially SSRIs, MAOs, or sedatives), consult your healthcare professional before using this product. Keep out of the reach of children. Store in a cool, dry place. Suitable for vegetarians/vegans.