when to check b12 level after injection Optimal Vitamin Dosage and Treating Deficiency For those taking injectable B12,

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Cyanocobalamin (Vitamin B12) Injection Cyanocobalamin (Vitamin B12) Injection (30 mL Vial) Cyanocobalamin (Vitamin B12) Injection (10 mL Vial) commercial product Product Overview Cyanocobalamin (vitamin B12) injection is a sterile, prescription-only parenteral formulation of a water-soluble cobalamin analogue that serves as the principal therapeutic option when oral absorption of the vitamin is impaired or when rapid repletion is clinically required

People may not be able to take vitamin B12 shots if they have a history of sensitivity to vitamin B12

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