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 How to Give B12 Injection: Safe Method & Tips 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 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,