Glutathione Peroxidase: An Antioxidant Enzyme In Health And Disease Glutathione is often called the body's master antioxidant for good reasonit helps detoxify, protect cells, and boost immunity. Supporting your natural levels starts with daily choices like eating sulfur rich foods (broccoli, garlic, Glutathione: A Little Miracle for Your Health Restorative Health Solutions Glutathione is the body's primary internal antioxidant, made using the amino acid cysteine, and it helps protect cells from oxidative stress. Beyond detoxification, research shows glutathione is involved in thyroid hormone metabolism, Longer Lifespans and Better Health with Glutathione: Taking the Confusion Out of the Master Antioxidant WholeFoods Magazine