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 Glutathione is such a critical soldier in our line of defense that our bodies make it themselves. We even have mechanisms that recycle and reuse it. But what happens when our toxic Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Glutathione found to significantly reduce acetaldehyde levels and help relieve hangovers