The Antioxidant Systems in Cancer Cells. Cancer cells exhibit a Download Scientific Diagram Selective killing of cancer cells harboring mutant RAS by concomitant inhibition of NADPH oxidase and glutathione biosynthesis Cell Death & Disease Glutathione arsenoxide hydrochloride AChR Apoptosis TargetMol Because glutathione levels decline as you age, and glycine can help slow the glutathione slide, it's a good idea to keep your levels high by eating protein rich foods, like organic poultry, grass fed