GAMMA AMINO BUTIRIC ACID is categorized as an amino acid which is a neurotransmitter of central nervous system. It exhibits calming activity which is why it is used in supplements to produce tranquilizing effects. It is used as body builders due to its growth hormone increasing property. It is useful for the symptomatic relief of premenstrual syndrome, improving mood and anxiety, promoting muscle growth, stabilizing blood pressure, increasing exercise tolerance and is used in the treatment of attention deficit-hyperactivity disorder.