GABA 500 mg, Douglas Labs GABA 500 mg, provided by Douglas Laboratories, supplies 500 mg of gamma amino butyric acid per each capsule. FUNCTIONS GABA (gamma-aminobutyric acid) is an amino acid that functions as a neurotransmitter in the brain. GABA is synthesized in the brain from another amino acid, glutamate, and functions as an inhibitory neurotransmitter meaning that it blocks nerve impulses. In the body, GABA is concentrated in the hypothalamus region of the brain and is known to play a role in the overall functioning of the pituitary gland which regulates growth hormone synthesis, sleep cycles, and body temperature. SUGGESTED USE Adults take 1 capsule daily with meals or as directed by physician. SIDE EFFECTS No adverse side effects reported.  Supplement Facts   Container Size 60 Caps   Serving Size 1 Cap   Amount Per 1 Cap Content %DV     GABA (gamma amino butyric acid) 500 mg   % Daily Values (DV) are based on a 2,000 calorie diet. * Daily Value (DV) not established. Product: GABA 500 mg Manufacturer: Douglas Labs Item #: 80611-60X Content: 60 Caps