5-htp is a precursor to serotonin, a neurotransmitter involved in sending meddages through the nervous system. Puritan’s Pride 5-htp 100 mg promotes a calm and reaxed mood. Puritan’s Pride 5-htp 100 mg (Griffonia Simplicifolia), contains 60 rapid release capsules. The serving size is 2 capsules, which contains: 126 mg of Calcium, 200 mg of 5- htp (L-5-Hydroxytryptophan) (from Griffonia Extract) (Griffonia simplicifolia) (seed). No Artificial Color, Glavor or Sweetener, No Preservatives, No Sugar, No Milk, No Lactose, No Soy, No Gluten, No Wheat, No Yeast, No Fish, Sodium Free.