What Is Glutathione? Glutathione (GSH) is often called the master antioxidant because it plays a central role in protecting your cells from damage. It's a naturally occurring molecule made from three 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, 9 Health Benefits of Glutathione 15 Glutathione Benefits: How to Improve Your Mind & Body Glutathione IV Shots Vie Aesthetics Liposomal Glutathione Terra Health Essentials