Science The antioxidant glutathione plays a key role in protein folding The team discovered a few years ago that if glutathione levels aren't precisely maintained in mitochondria, all systems fail. On Amazon.com: Immunocal Glutathione Precursor Supports Natural Glutathione Production Immune & Antioxidant Support, Cellular Health Sugar Free, Lactose Free 30 Servings : Health & Household Glutathione: The Super Antioxidant ANM Jupiter Glutathionylation Analysis Service Site & Level Quantification Creative Proteomics Glutathione is a small protein made of three amino acids. It is often called the master antioxidant because it helps regenerate other antioxidants like vitamin C and vitamin E. Key Benefits Glutathione in Protein Redox Modulation through S Glutathionylation and S Nitrosylation