What Is Glutathione? Vitality Medical Wellness Center Supporting Your Immune System Naturally with Glutathione Dr Hagmeyer 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, University Did you know Glutathione is your body's master antioxidant? It protects your cells from damage, boosts energy levels, and supports your immune system, all while helping to detoxify your body. Benefits of Glutathione Helps Detox Your Liver And Muc Water for Health