What Does Glutathione Do for Skin? What, Why & How? ARM What is glutathione? Know as the most important antioxidant in the body, glutathione is an essential antioxidant manufactured in all cells, but primarily in the liver. It is essential because it Liver Function Tests (LFTs) Used to assess liver injury, cholestasis, and synthetic function Patterns of abnormality help identify disease category Abnormal LFTs are common in diabetes, especially due to NAFLD Normal LFTs Liposomal Glutathione Rho Nutrition