Glutathione Injectable Formats Explained Eden 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 Injection Faces By Bae Subcutaneous Injection Sites and Instructions for Safe Self Administration Glutathione Injections Redondo Beach How To Give A Subcutaneous Injection And Sites The HCG Institute