B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Cyanocobalamin 1,000 mcg mL Injection 1 mL McKesson B12 vitamin Store Intramuscular vs Subcutaneous Injections for vitamin B12 supplements.
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