A Beginner's Guide to Glutathione Injections: What to Expect How to Self Administer Subcutaneous & Intramuscular Injections How to Give Yourself a Shot (SubQ) Olympia Pharmaceuticals Intramuscular vs Subcutaneous injections what's the difference? At KDR, we often use peptides and wellness injections like NAD, glutathione, and HCG, but they are not all administered the same way. Intramuscular injections ( Reasons to Get a Glutathione Injection Century Medical & Dental Center Subcutaneous Injection Sites and Instructions for Safe Self Administration