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 8 Foods Containing the Highest Quantity of Glutathione Foods to Boost Glutathione Anne Angelone Top 15 Glutathione Rich Foods: Health & Detox Benefits Boost Glutathione for Better Health and Brighter Skin InVita Wellness