About this item SUPPORTS POSITIVE MOOD*: 5-HTP is the intermediate metabolite between the amino acid tryptophan and serotonin. NEUROTRANSMITTER SUPPORT*: Extracted from the seed of an African plant (Griffonia simplicifolia). CLASSIFICATIONS/CERTIFICATIONS: Kosher, Non-GMO GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation). Packaged in the USA by a family owned and operated company since 1968.