Gamma-aminobutyric acid (GABA) is a natural non-protein amino acid, which is an important inhibitory neurotransmitter in the central nervous system of mammals. About 30% of the synaptic sites of the central nervous system use GABA as the transmitter. It plays an important role in the human cerebral cortex, hippocampus, thalamus, basal ganglion and cerebellum, and regulates various functions of the body. When GABA is deficient in human body, anxiety, anxiety, fatigue, anxiety and other emotions will arise.