Master Antioxidant" Glutathione Affected by Vitamin D Status GrassrootsHealth Glutathione deficiency and heart failure: a systematic review of human and animal evidence ScienceDirect 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 Diseases with Documented Low Glutathione [70]. Download Scientific Diagram