γ- aminobutyric acid (GABA) is a natural non-protein amino acid. It is the chief inhibitory neurotransmitter in the mammalian central nervous system. And it is the transmitter of about 50% central nervous system synapses. It plays an important role in the cerebral cortex, hippocampus, thalamus, the basal ganglia and cerebellum. And it regulates the body's multiple actions. Its lackness will cause nervous, anxiety and tiredness. Generally, peoples who are under high-pressure long (such as people in the competitive environment, athlete and office workers) are easily lack of GABA. And they need supple GABA in time to sooth emotions.