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 8 Ways to Increase Glutathione Levels Naturally N acetylcysteine supplementation increases exercise performance and reduces oxidative stress only in individuals with low levels of glutathione ScienceDirect Discover How Glutathione Helps Athletes Recovery, Strength & Energy