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: the Molecule of longevity Laboratorio Val Sambro Amazon.com: 2400MG Liposomal Glutathione, with Vitamin C, Milk Thistle & Alpha Lipoic Acid, Master Antioxidants, Pure Reduced L Glutathione Immune System, Cell Repair, Energy, High Absorption, 60 Softgels : Health & Household Biom Probiotics, L Glutathione Suppositories for Adults, 500mg, Antioxidant, Immune Support Walmart.com