What To Avoid When Taking Glutathione Glutathione 500 mg Plus 21st Century Vitamins 21st Century Vitamins FDA Advisory No.2026 0015 Public Health Warning Against the Purchase and Consumption of the Unregistered Food Supplement (UNBRANDED) Glutathione Capsules (1,000 MG Capsules, Dietary Supplement) Food and Drug Administration The reason some people stay sick despite treatment often comes down to one molecule. Glutathione is the most abundant antioxidant inside your cells. It protects mitochondria, recycles other antioxidants, and repairs