How Keeping Glutathione Levels Up Can Benefit Your Health & Your Vitamin D Status GrassrootsHealth Diseases with Documented Low Glutathione [70]. Download Scientific Diagram 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 Manage Autoimmune Disease with Glutathione Amandean