Glutathione (GSH) is a tripeptide composed of glutamine, cysteine, and glycine, widely studied for its role as a major intracellular antioxidant. It helps maintain cellular redox balance by neutralizing reactive oxygen species (ROS) and supporting detoxification pathways in the liver and other tissues.

Glutathione is believed to protect cells from oxidative stress, support immune function, and assist in the regeneration of other antioxidants like vitamins C and E. It is commonly researched for its possible effects on cellular health, detoxification, anti-aging processes, and overall metabolic support.