Ultimate Nutrition GABA 90 Caps - Ultimate Nutrition Gamma-aminobutyric acid, abbreviated as GABA, is an amino acid that is produced in the brain. It is formed by glutamic acid in the body with the help of vitamin B6, and prevents nerve cells from firing too much and, thus, they have a calming effect. As such, GABA serves as a neurotransmitter. Studies have shown that ingestion of GABA releases growth hormone especially after exercise, with remarkable effectiveness. This release increases lean body mass. It is an invaluable nutritional supplement for body builders, power lifters, runners, martial artists, and other athletes. To an extent, it also regulates appetite, which is helpful in maintaining optimal weight. In addition, because of its calming and soothing effects, GABA also lowers blood pressure, helps control hypoglycemia, prevents anxiety and promotes restful sleep.