Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification 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 SLC25A39 is necessary for mitochondrial glutathione import in mammalian cells Nature Antioxidant glutathione discovered to play a key role in proper protein folding