L Glutamine vs L Glutathione: What's the Difference? H PROOF 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 L Glutathione vs. oxidized vs. Reduced Glutathione The pros have been gate keeping this for years! L glutathione is the best kept secret for radiant skin. Its a tripeptide, meaning its made from 3 amino acids (your bodys building blocks) and is the