Glutathionesulfonic acid is primarily utilized in biochemical research to study oxidative stress and its effects on cellular components. It serves as a valuable tool for investigating the role of glutathione derivatives in cellular defense mechanisms against oxidative damage. Researchers use it to mimic conditions of oxidative stress in vitro, helping to understand how cells respond to and mitigate such stress. Additionally, it is employed in the development of assays to measure antioxidant activity and to evaluate the efficacy of protective compounds in preserving cellular integrity under oxidative conditions. Its application extends to studies on detoxification processes and the metabolism of sulfur-containing compounds in biological systems.