What is glutathione? Know as the most important antioxidant in the body, glutathione is an essential antioxidant manufactured in all cells, but primarily in the liver. It is essential because it GLUTAONE INJ. (GLUTATHIONE 1200MG) [KI] AceCosm No injectable glutathione or skin lightening agents have been approved for use FDA MyJoyOnline FDA Advisory No.2024 0159 Public Health Warning Against the Purchase and Consumption of the Unregistered Food Supplement AMSB Glutathione Capsules 1000mg Capsules Dietary Supplement Food and Drug Administration