GABA
GABA is gamma-Aminobutyric acid (γ-Aminobutyric acid). It is a neurotransmitter in the central nervous system of mammals. It is an inhibiting neurotransmitter. Normally, when a neuron receives an impulse, it will make the signal stronger. In the case where there is an inhibiting neurotransmitter, the cell will no longer get the impulse, and the signal as a whole will be weakened.