GABA (Gamma-Aminobutyric Acid) is a non-protein amino acid that functions as a neurotransmitter in the human brain.* GABA is naturally produced in the body and its presence within the central nervous system may help promote relaxation and ease nervous tension.* This dietary supplement is made with non-GMO ingredients and is suitable for vegan/vegetarians. NOW Supplements are 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). NOW supplements are packaged in the USA by a family owned and operated company since 1968.