CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Vitamin B12 forms and their differences for MTHFR gene mutation individuals Hydroxocobalamin acetate (Vitamin B12a acetate) Cyanide Antidote MedChemExpress Cyanocobalamin (B12) Products American Regent Cyanocobalamin vs. Methylcobalamin: What's the difference? Both are forms of vitamin B12, essential for energy, brain health, and red blood cell production. But here's the key: Cyanocobalamin is synthetic and needs