Glutathione is a tripeptide composed of glutamate, cysteine, and glycine, and is often referred to as the body's master antioxidant. It plays a critical role in protecting cells from oxidative stress and free radical damage. Research has demonstrated glutathione's importance in detoxification processes, immune function, and cellular metabolism. The peptide is essential for maintaining the reduced state of other antioxidants such as vitamins C and E. Studies examine its role in mitochondrial function, protein synthesis, and DNA repair mechanisms. Glutathione research spans applications in aging, neurological health, and metabolic function.