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, Supporting Your Immune System Naturally with Glutathione Dr Hagmeyer NAC and Glycine: The Efficient Way to Raise Glutathione Glutathione: Master Antioxidant, Detoxifier, and Immune Booster Kaplan Center for Integrative Medicine : McLean, Virginia The Role of Glutathione and Glutathione Transferases in Chemical Cardnogenesi: Critical Reviews in Biochemistry and Molecular Biology: Vol 25, No 1 14 Glutathione Benefits for Your Body and Health Annex Naturopathic Clinic