“Unlocking Immunity: Glutathione’s Impact as an Intracellular Antioxidant and T-Cell Enhancer” Glutathione (GSH) is often hailed as the ‘master detoxifier,’ ‘ultimate antioxidant,’ and ‘conductor of the immune system.’ As Gustavo Bounous, MD, a former professor of surgery at McGill University in Montreal, said, “It’s the body’s most crucial antioxidant because it’s within the cell” (a-3).