B12 Injection sites + How to use B12 Shots Safely Compounded Cyanocobalamin (Vitamin B12) Injection Empower Benefits of B12 Injections: Boosts energy levels & reduces fatigue Supports brain function & mental clarity Helps produce red blood cells Supports metabolism & overall wellness Red liquid (vitamin B12) in a disposable syringe with a needle and in a glass ampoule on a white background. Lots of empty space Stock Photo Alamy Feeling more tired, sluggish or low in mood? You're not alone shorter days and colder weather can leave your body needing that little bit of extra support. Vitamin B12 injections are Cobafast Kit