Gamma-aminobutyric acid (GABA) functions by occupying neural receptor sites, preventing the transmission of other signals. When activated, GABA receptors induce sleep.* 
While GABA is an amino acid, it is classified as a neurotransmitter. It is the most abundant inhibitory neurotransmitter in the brain and can influence brain function.*

Studies suggest that niacinamide and inositol work synergistically with GABA.* Niacinamide's action helps inhibit stress signals from reaching motor centers of the brain, while inositol acts as a mediator of adrenaline.
Kirkman’s GABA supplement is made from GABA of exceptional quality and purity.