B12 Injections at Olympia B12 vitamin Store Intramuscular vs Subcutaneous Injections for vitamin B12 supplements. What Size Needle for B12 Injection? 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
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