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 Ask the Doctors What do glutathione supplements do? UCLA Health Exogenous glycine promotes oxidation of glutathione and restores sensitivity of bacterial pathogens to serum induced cell death ScienceDirect