How Does a Cyanocobalamin Injection Compare to Semaglutide? Cyanocobalamin Injection Exporter 500mcg ml at Attractive Price 10 Ampoules CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL NEW TREATMENT ALERT A vitamin B12 injection helps treat or prevent deficiency by delivering the vitamin directly into the bloodstream. It's often used for people with absorption issues and is usually safe Vitamin B12 Injections