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 Esther Formula Lyuh Esther Liposome Glutathione Direct Ultra X (325mgx30p) Is Glutathione the Master Antioxidant? Heres What Science Says Glutathione an overview ScienceDirect Topics