Phase II Glutathione Conjugation Metabolism of Herbicides or Xenobiotics in Plants passel Glutathione Amino Acids: Why Supplements May Not Work Figure 3 from Glutathione synthesis. Semantic Scholar 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, Glutathione You Are The Healer