... glutamic acid through glutamate decarboxylase, GABA, a kind of natural non-protein amino acid, is an important neurotransmitter of ... products. 3. as the natural ingredients used in coffee, chocolate, apple juice, cocoa, yogurt, milk sugar, butter, toast, bread, instant ... noodles and other functional food and drinks. CAS NO. 56-12-2 Microbial fermentation,Rice bran, Natural ...