Gamma-aminobutyric acid (GABA) is one of the major inhibitory neurotransmitters in the central nervous system, balancing the excitatory effects of glutamate on neuronal activity. The inhibitory effects of GABA are generally considered to lessen anxiety, relax muscle tension, and have sedative-like effects.2,3,4 GABA has also been shown to cause a significant increase in alpha brain waves, which are associated with a more relaxed state and better concentration.