... glutamic acid through glutamate decarboxylase, GABA, a kind of natural non-protein amino acid, is an important neurotransmitter of the ... GABA Applications of GABA The natural GABA has been internationally recognized as the 21st century's health supplements. Early in 2001, ... into the tea, beverages and milk products. 3. as the natural ingredients used in coffee, chocolate, apple juice, cocoa, yogurt, ...