FDA highlights concerns with using dietary ingredient glutathione to compound sterile injectables FDA Glutathione IV Therapy: What You Need to Know COEM Which Area of the Body Is Best to Inject Glutathione? Glutathione Brightening Shots Subtly You Glutathione is known as the master antioxidant for a reason It helps protect your cells from damage, brightens your skin, and supports your liver in detoxifying your body from the inside