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 an overview ScienceDirect Topics 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 have you heard of it? A little research & you will learn like I did. Symptoms if your glutathione may be low: Feeling run down or low energy Getting sick more Glutathione Deficiency: Symptoms, Causes, and Treatment