What is the recommended dose for a monthly vitamin B12 (cobalamin) injection ? Rx Item Cyanocobalamin 1000mcg 1X30 ML Multi Dose Vial by Hikma Pharma Cyanocobalamin (B12) Injection 1000 mcg mL, Multiple Dose Vial 30 mL McGuff Indulge in a deeper level of wellness with our high dose 2,500 mcg Vitamin B12 injection. This elevated formulation delivers more than double the strength of a traditional 1,000 mcg B12 shot,
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