Ever wonder where the correct area to inject is? Always follow your clinician's guidance. These are the common SUBCUTANEOUS areas most people use: Abdomen: soft area LEFT RIGHT of the belly button Subcutaneous Injection: What It Is and How to Give One 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 Give a Subcutaneous Shot: Care Instructions