Zencortex:- Gamma-aminobutyric acid (GABA) is a neurotransmitter that blocks specific brain signals and decreases activity to achieve a state of calmness. The supplement version is often consumed not only to promote relaxation but also to reduce stress and symptoms of depression. Other areas naturally affected by GABA include blood pressure function, sleep, and fatigue. According to a recent study that explored the possible reasons for tinnitus, one team highlighted the absence of GABA and glutamate in the auditory cortex as the culprit.