5-HTP Double Strength, 200 mg, 120 Veg Capsules, NOW FoodsNOW Foods Double Strength 5 HTP 200 mg With Glycine, Taurine & Inositol. Supports Positive Mood. Vegetarian Vegan. NOW Double Strength 5 HTP has twice the 5 HTP (200 mg per capsule) as in our regular strength product (100 mg per capsule). 5 HTP, the intermediate metabolite between the amino acid Ltryptophan and serotonin, is extracted from the bean of an African plant (Griffonia simplicifolia). Supplement Facts Serving Size: 1 Veg Capsule Servings Per