DETAILS Neurotransmitters are chemical messengers found throughout the central nervous and multiple organ systems. They help drive vital functions and one of their most important roles is in regulating mood. Gamma aminobutyric acid (GABA), is the most important inhibitory neurotransmitter in the brain. Its signals protect against overstimulation or excitement of the brain, creating a calming effect. AOR Advantage AOR’s GABA™ provides 600 mg pharmaceutical grade gamma aminobutyric acid, which has a purity of over 99%. erving Size: One Capsule Gamma-aminobutyric acid 600 mg Non-medicinal Ingredients*: none. Capsule: hypromellose. *NMIs are subject to change. Always read and follow the label for accurate ingredient and allergen information