Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide Self injecting vitamin B12. Quick and painless jabs after a B12 by Dr Caroline Palmer Medium 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 at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 Injection sites + How to use B12 Shots Safely Vitamin B12 Injections Benefits & Where to Book Hydrate IV Bar