What is Glutathione? What are the Benefits of Glutathione? Dr. Glutathione (GSH) is the most prevalent, powerful antioxidant in the body and recharges other antioxidants, but our ability to produce it declines as we age. That's why it's a Glutathione an overview ScienceDirect Topics What is glutathione? Know as the most important antioxidant in the body, glutathione is an essential antioxidant manufactured in all cells, but primarily in the liver. It is essential because it