9 Health Benefits of Glutathione Glutathione: The Master Antioxidant And How to Support It Naturally If you've heard of glutathione, you've likely seen it called the master antioxidantand for good reason. It plays a central Glutathione is nicknamed the master antioxidant because it is the most abundant, body produced (endogenous) antioxidant found in every cell, essential for neutralizing free radicals, recycling other antioxidants (like Vitamin C and E), How Do Cells Produce Glutathione? Glutathione Reporter NOX like ROS production by glutathione reductase: iScience Glutathione Wikipedia