Glutathione Benefits for Gut Health Nikki Yelton RD Figure 1 from The role of glutathione in photosynthetic organisms: emerging functions for glutaredoxins and glutathionylation. Semantic Scholar What is glutathione and why must we protect patient access to it? Functions of glutathione. Download Scientific Diagram 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,