A Beginner's Guide to Glutathione Injections: What to Expect 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 ( Glutathione Shots in Tacoma, WA Catalyst Medspa Glutathione IV Add On Vitamin Therapy Next Health Vitamin Injections & Booster Shots Sierra IV Hydration What is the dose of Glutathione for intramuscular (IM) or subcutaneous (SC) administration?