Mark Hyman, MD Levels 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 Mark Hyman, MD Physician Advocate Educator Podcast Host Gluathione: A Super Antioxidant Pride Dental Brain Fog and Blue Moods Could Be Signs of a Glutathione Deficiency, Doctor Warns