How Glutathione Protects You from Radiation and Other Assaults Shungite Queen Our glutathione in plants Face Serum is a powerhouse antioxidant that helps brighten your complexion, combat signs of aging, and promote an even skin tone. Our serum is crafted from pure plant Schematic diagram showing plant cellular glutathione metabolism, Download Scientific Diagram Item Scheme showing the enzymatic reactions that catalyze the pyruvate dehydrogenase complex, including pyruvate dehydrogenase activity and diaphorase activity of DLD (A) as well as the glutathione reductase peroxidase activity (B).