How to Self Administer Subcutaneous & Intramuscular Injections Glutathione Injection in Arcadia, Beverly Hills and Los Angeles County California Infusion Centers 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 ( Intramuscular and Subcutaneous Injections Clinical Skills Glutathione IV in Los Angeles Sessions & Results Explained How to Give a Subcutaneous Shot: Care Instructions