Optimal Vitamin B12 Dosage and Treating Deficiency Cyanocobalamin vs Hydroxocobalamin (Vitamin B12 forms) Key Clinical Differences Hydroxocobalamin is preferred in: Pernicious anemia Severe vitamin B12 deficiency Neurological symptoms (subacute combined degeneration, neuropathy) Cyanocobalamin is Best Vitamin B12 Injections Dosage And Frequency PA Relief Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods Liv Hospital Methylcobalamin vs Cyanocobalamin: What's the Difference? Feron 200 + B12: iron and vitamin B12 for piglets Elanco