Gamma-aminobutyric acid (GABA) is a neurotransmitter that plays a crucial role in calming the nervous system and reducing excessive brain activity. It is known for its ability to promote relaxation, improve sleep quality, and help manage stress and anxiety. GABA also supports cognitive function by enhancing focus and reducing mental fatigue. Additionally, it plays a role in muscle tone regulation, making it beneficial for athletes and those engaged in physical training. Some research suggests that GABA may aid in lowering blood pressure and boosting immune function. While the body naturally produces GABA, some people supplement it to enhance relaxation and overall well-being.