1 ,It is natural GABA which is from the biotransformation of rice bran. 2 ,The content series we produced is 20% -99% What is Gamma amino butyric acid (GABA) 1. Catalytically converted from glutamic acid through glutamate decarboxylase, GABA, a kind of natural non-protein amino acid, is an important neurotransmitter of the central nervous system for mammals.2. GABA can be found in our eye retinas ...