Glutathione (GSH) is an essential, naturally occurring tripeptide composed of three amino acids: glutamine, glycine, and cysteine. It operates as the principal non-enzymatic antioxidant within mammalian cells, defending against reactive oxygen species (ROS) and free radicals. By serving as an electron donor, Glutathione prevents cellular damage and supports the structural integrity of proteins and lipids under oxidative distress.

Current laboratory and in-vitro applications focus on its robust protective and detoxifying properties. Researchers utilize Glutathione to observe its mechanisms in mitigating lipid peroxidation, regulating cellular apoptosis, and supporting mitochondrial function. In-vitro models frequently highlight its capacity to enhance cellular resistance to toxic insults and heavy metals, making it a critical compound for research into cellular longevity, oxidative stress responses, and foundational immunological pathways.