GABA (gamma-aminobutyric acid) is a non-protein amino acid that functions as a neurotransmitter in the human brain. GABA is known as the brain's calming agent and is produced naturally in the body. By supporting naturally balanced brain stimulation, the presence of GABA in the central nervous system can help promote relaxation and ease nervous tension. Protocol For Life uses only the natural L-form of GABA found in food as well as in the body. GABA NOW® chewable tablets with a delicious orange flavor combine this natural neurotransmitter with the relaxing amino acids taurine and theanine for their complementary functions.