What Is Glutathione & Its Uses What are Glutathione Benefits? Uses & Side effects Explained Glutathione analysis and quantification in Korean supplements: method development and validation Food Science and Biotechnology Springer Nature Link 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, The benefits of glutathione the king of antioxidants!