B12 vitamin Store How to Perform a Subcutaneous Injection of Vitamin B12 Vitamin B12 Shots in Fort Lauderdale Off Weight Loss Solutions by Life Science RX Benefits of B12 Injections for Optimal Health Administration of vaccines The Australian Immunisation Handbook 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 Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r B12_Deficiency