Subcutaneous Injection: What It Is and How to Give One How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute B12 vitamin Store Intramuscular vs Subcutaneous Injections for vitamin B12 supplements. How to Give a Subcutaneous Injection Video & Image How to Give Yourself a Shot (SubQ) Olympia Pharmaceuticals Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches