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: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Frontiers Paracetamol Induced Glutathione Consumption: Is There a Link With Severe COVID 19 Illness? Frontiers Glutathione S Transferase Pi Prevents Sepsis Related High Mobility Group Box 1 Protein Translocation and Release Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Adaptive epigenetic response of glutathione (GSH) related genes against lead (Pb) induced toxicity, in individuals chronically exposed to the metal ScienceDirect