Vitamin B12 Injections Cost Near Me in Shoreline WA Vitamin B12 Injection Dosage For Adults: A Comprehensive Guide. La Vie Med Spa Optimal Vitamin B12 Dosage and Treating Deficiency I receive monthly intramuscular vitamin B12 (cobalamin) injections, but my serum B12 level measured two weeks after the injection is only 268 pg mL; why is it low and how should the dosing 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 Optimal Vitamin B12 Dosage and Treating Deficiency