Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief How to Give B12 Injections at Home to Yourself PA Relief Best Vitamin B12 Injection Site: Administering B12 Shots 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 How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute Subcutaneous Injection Sites and Instructions for Safe Self Administration