Methylcobalamin B12 Injections Miami Vitamin B 12 Cyanocobalamin Injection 1000MCG mL 30 mL MDV Med Plus Physician Supplies Cyanocobalamin 1,000 mcg mL Injection 1 mL McKesson Vitamin B12 Forms Cyanocobalamin is the preferred supplemental form of vitamin B 12 as there is insufficient evidence to support the efficacy of the other forms like methylcobalamin. Michael Greger MD, How Not to Die. Vitamin B12 Injection: Energy Boost and Anemia Treatment Mountainside Medical