C peptide is a biomarker for beta cell function. In other words, it's a measure of beta cell health and insulin production, and is critical to developing new disease modifying therapies for type 1 The role of dietary antioxidants in type 2 diabetes and neurodegenerative disorders: An assessment of the benefit profile ScienceDirect The Benefits of Glutathione Injections and Where to Get Them Burick Center for Health and Wellness Effects of Vitamin E and Glutathione on Glucose Metabolism Hypertension Oxidative stress in diabetes mellitus and its complications: From pathophysiology to therapeutic strategies Chinese Medical Journal Plant Based Diets and Phytochemicals in the Management of Diabetes Mellitus and Prevention of Its Complications: A Review