5-HTP 5-hydroxytryptophan is a naturally-occurring metabolite of the essential amino acid tryptophan. 5-HTP for use in dietary supplements is derived from the seeds of the Griffonia simplicifolia plant. Supplement Facts Serving Size 1 Capsule Serving per container 120 servings Amount Per Serving Vitamin C 200 mg Vitamin B6 Pyridoxine hydrochloride 15 mg 5-hydroxy L-tryptophan 100 mg Other Ingredients Cellulose veggie cap, rice powder, magnesium stearate, silicon dioxide. Directions: One capsule, one to three times daily, with or without food.