Figure. Subcutaneous injection into the deltoid area The Australian Immunisation Handbook Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief 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 Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute