5+ Ultimate Tips On How To Give B12 Shot You Must Follow B12 INJECTIONS A B12 injection offers a quick and effective boost to energy levels, supports metabolism, and improves overall wellbeing. This vitamin is essential for red blood cell formation, proper nerve function, Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches 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 Intramuscular Injection (IM) OSCE Guide IM Injection Geeky Medics