Essential foods to boost glutathione levels 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 What is Glutathione? What are the Benefits of Glutathione? Glutathione Foods to Raise Glutathione Levels LivOn Labs Top 8 Glutathione Rich Foods and a Convenient Supplement Alternative Opti15 Foods rich in glutathion (antioxidant)