Ivy Grove Surgery : Self administration of B12 injection Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief Common IM Injection Sites Deltoid (Upper Arm) Location: About 23 finger widths below the acromion process (shoulder bone). Best for: Vaccines and small volume injections (1 mL). Notes: Easy to access but limited Vitamin B12 Injection Dosage for Adults: 7 Key Medical Guidelines Liv Hospital Intramuscular Injection (IM) OSCE Guide IM Injection Geeky Medics B12 injections training course 300 One day course perscriber set up for prescriptions with our nurse insurance referral learning how to take blood pressures included each injection would cost you around