Optimal Vitamin B12 Dosage and Treating Deficiency Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project 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 B12 Injection Dosage and Frequency: 7 Essential Guidelines for Adults Liv Hospital Vitamin B12 Injection Dose for Adults: 7 Key Facts on Dosage & Frequency Liv Hospital B12 Shots for Weight Loss: What You Need to Know ISSA