What is glutathione and why must we protect patient access to it? What is Glutathione? GoldBio Glutathione: What It Is, Why You Need It, How You Can Increase It The Amino Company Glutathione is the body's primary internal antioxidant, made using the amino acid cysteine, and it helps protect cells from oxidative stress. Beyond detoxification, research shows glutathione is involved in thyroid hormone metabolism, 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