Gluathione: A Super Antioxidant Pride Dental What Is Glutathione? Purifi IV 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 BOOST GLUTATHIONE NATURALLY Sulfur rich foods (allium + cruciferous + poultry fish beef) boost glutathione synthesis. Vitamin C raises glutathione by fighting free radicals. Selenium rich foods support glutathione production. Glutathione rich foods