Glutathione is a naturally occurring antioxidant that plays a key role in detoxification, cellular repair, and immune defense By delivering it through IV therapy, you bypass digestion and allow for higher bioavailability FDA highlights concerns with using dietary ingredient glutathione to compound sterile injectables FDA Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust How to Give Yourself an Intramuscular Injection