Gamma-Aminobutyric Acid (GABA) is a naturally occurring neurotransmitter with central nervous system (CNS) inhibitory activity. Gamma-aminobutyric acid, converted from the principal excitatory neurotransmitter glutamate in the brain, plays a role in regulating neuronal excitability by binding to its receptors, GABA-A and GABA-B, and thereby causing ion channel opening, hyperpolarization and eventually inhibition of neurotransmission. Experimental spectrum in Natural Products Magnetic Resonance Database: [NP0000970](https://np-mrd.org/natural_products/395/submission_spectrum_view?spectrum_id=230&spectrum_type=real)