Vita D Vitamin D 300, 000iu 5mg 1ml Vitamin D3 Hydroxy Vitamin B 12 B12 Injection of Amine Hydroxide Defective Vitamin C How to Give a B12 Injection: Step By Step Instructions Vitamin B12 for Injection Cyanocobalamin 1,000 mcg, 25 Box (Rx) Mountainside Medical Have you ever received a vitamin B12 injection? If so, how did you feel? Vitamin B12 injections have many benefits, some including: Improving energy levels Enhancing mood Improving cognition Supporting heart function