Vitamin B12 Subcutaneous Injection How to self administer subcutaneous B12 injection., 1. Withdraw proper dosage from vial into an insulin syringe, 2. Clean site of injection (abdomen or other proper site), 3. Pinch the skin where you Is intramuscular (IM) administration of vitamin B12 injections preferred over subcutaneous (SC) administration? Are you feeling run down? Low Energy? A quick Vitamin B12 injection can help support energy, metabolism, and overall wellness. It delivers the vitamin directly into the muscle, allowing your body to Choosing the Right Needle and Syringe for B12 Injections: A Complete Guide CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL