Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief What Happens If You Inject B12 Wrong: 6 Red Flags 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 intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust How SubQ Injections Like B12 and NAD+ Fit Your Routine Olympia Pharmaceuticals