GSH exists as a tri amino acid combination of glycine, cysteine, and Download Scientific Diagram 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, Newly revealed amino acid function could be used to boost antioxidant levels EurekAlert! Glutathione glycine 13C2,15N trifluoroacetate Stable Isotope MedChemExpress Glutathione for Food and Health Applications with Emphasis on Extraction, Identification, and Quantification Methods: A Review