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 Frontiers Glutathione deficiency in the pathogenesis of SARS CoV 2 infection and its effects upon the host immune response in severe COVID 19 disease Glutathione: The Master Antioxidant Keeping Your Cells in Check Vitall IV Glutathione and Diabetes Mellitus GSH and Diabetes Care Glutathione Benefits For Your Health And Skin Plixlife Glutathione metabolism in type 2 diabetes and its relationship with microvascular complications and glycemia PLOS One