Glutathione IV Therapy: What You Need to Know Is glutathione safe? Glutathione: Benefits and Supplements 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 Glutathione metabolism in type 2 diabetes and its relationship with microvascular complications and glycemia PLOS One