Insulin Devices l Learning to Inject l Danatech Luer Lock Syringes 3 mL without Needle 5 16 inch, 0.3 mL Ultra Fine, 1 Mountainside Medical 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 B12 Shots for Weight Loss: What You Need to Know ISSA Vitamin B12 Injections in Wheaton, IL Jade Aesthetics