Glutathione Glutathione is a natural substance that is present in all human cells. It functions as an antioxidant, which means that it donates electrons to quench free radicals, ultimately protecting cells. If glutathione is depleted in a cell, it will lead to cell death. Glutathione protects cells of many types, especially the skin, lens, retina, and cornea. It is also a co-factor in many bodily processes and is the foundation for the main detoxification pathway in the liver, kidneys, lungs, intestinal lining, and other organs. Glutathione has been the subject of scientific research for many years. Studies have shown that levels of glutathione directly correspond to the health and function of cells. In our office we assess and prescribe IV glutathione.