Contains the antioxidant cysteine. Pure l-cysteine can be degrated into the body into cysteinie, which is toxic. Glutathione is recommended because it is not broken down into harmful substances.
Glutathione is absorbed from the gastrointestinal tract and cannot crystallize in the kidneys. It can be recycled in the body by certain enzymes.
Protects against the cross-linking of proteins.
Functions as the effective portion of glutathione peroxidase, a free-radical-protection enzyme system that contains selenium.