Glutathione for Food and Health Applications with Emphasis on Extraction, Identification, and Quantification Methods: A Review Glutathione Amino Acids: Why Supplements May Not Work The Importance of Glutathione in Health and Healing Dr. Todd Maderis 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,