Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification NAC vs Glutathione: Differences, Similarities And Health Benefits Structure of the tripeptide glutathione (GSH). Glutamic acid (Glu) is Download Scientific Diagram NAC and Glutathione are closely related. Here is an analogy to help you understand how these work and better determine which might be right for you! NAC = Baking Bread Your Fix Your Health by FIRST Fixing Your Gut Bacteria (Do This!)