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 Push DermKing Institute Glutathione Injections: Benefits, How It Works & Telehealth Modern Endocrine Glutathione IV for Liver Detox: Support & Benefits AZ IV Medics IM Injections Revive at The Group Med Spa