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 ( How to prepare & administer Glutathione IV Push for full body skin whitening. #glutathione #white Which Body Area Is Best to Inject Glutathione? What are IM Injections, and How Do They Differ from Other Injection Methods? Glutathione 30 dose Self Injection Kit (with optional Vitamin C)