GABA GABA is gamma-aminobutyric acid, an amino acid derivative that is created from glutamine, a conditional amino acid. Dosage: 1000 mg GABA per serving This dietary supplement from Biotech USA acts as an inhibitory neurotransmitter, blocking stimuli between nerve cells and the brain or spinal cord. It is synthesized from glutamic acid and is an essential component for a healthy nervous system, as it helps reduce feelings of fear, anxiety, and stress. Recommended use: For athletes. It can be used in combination with a complex multivitamin product. For men and women. For those who want to meet their needs for gamma-aminobutyric acid (GABA) in tablet form.