Glutathione Benefits: What Science Says About This Master Antioxidant What are the Side Effects of Glutathione? 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 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 Role of Glutathione in Cancer: From Mechanisms to Therapies