(5-Hydroxytryptophan) Supports Positive Mood With Glycine, Taurine & Inositol Non-GMO A Dietary Supplement Vegetarian/VeganHow It Work: 5-HTP is the intermediate precursor in the natural synthesis of serotonin, a neurotransmitter that helps to regulate mood, appetite, and sleep/wake cycles. 5-HTP readily crosses the blood-brain barrier and clinical studies suggest that 5-HTP can support health serotonin levels. Serotonin is associated with positive mood and provides a substrate for the production of melatonin. This formula includes B-Vitamins as cofactors, and is further enhanced with Glycinate, Taurine, and Inositol.