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 High Absorption Liposomal Glutathione MegaFood Glutathione, the Underrated Antioxidant You Need in Your Diet Top 15 Glutathione Rich Foods: Health & Detox Benefits Foods rich in glutathion (antioxidant)