Gamma-aminobutyric acid can be purchased at your local drugstore and at some health supplement sites on the internet. Gamma-aminobutyric acid is a kind of central nervous system inhibitory neurotransmitter, also known as y-aminobutyric acid complex finished product, has the effect of certain relief of mental stress, is a kind of health care product. gamma-aminobutyric acid can generally be bought within the local drugstore, and in addition can be bought through some on-line website health care partition, the buyer can choose different purchase channels according to the demand. Gamma-aminobutyric acid is a health supplement, not a drug, and it is important to note that the effects of a drug cannot be replaced by a health supplement. Purchasers who have mental problems should first seek medical diagnosis instead of taking health supplements. If any physical abnormality occurs after taking γ-aminobutyric acid, medical attention should be sought immediately to avoid delay.