Glutathione is a naturally occurring tripeptide composed of glutamate, cysteine, and glycine. It is widely studied for its role in cellular antioxidant systems, redox balance, and protection against oxidative stress.

Research involving glutathione has examined its involvement in cellular defense, detoxification pathways, mitochondrial function, and maintenance of intracellular redox balance. Because glutathione participates in numerous biochemical processes, it remains an important compound in laboratory research involving oxidative stress and cellular function.