B12 vitamin Store How to inject B12 in your arm How to Give Yourself a Shot (SubQ) Olympia Pharmaceuticals Cyanocobalamin Vitamin B12 Injection 1000 mcg Mountainside Medical 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 Subcutaneous Injection: What It Is and How to Give One