Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg Safe intramuscular injection site in buttock 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 Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute Why buttock injections? Vinmec
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how to inject b12 in the buttocks Buttock intramuscular injection site: Safest 2025