@mamab5
GABA is not an amino acid.
A note from Cleveland Clinic
Gamma-aminobutyric acid (GABA) is the most common inhibitory neurotransmitter in your central nervous system. GABA lessens the ability of a nerve cell to receive, create or send chemical messages to other nerve cells. GABA is known for producing a calming effect. It’s thought to play a major role in controlling anxiety, stress and fear. Decreased GABA levels are associated with several neurological and mental health conditions, as well as other medical conditions. Increasing GABA levels may help treat high blood pressure, diabetes and insomnia.