If you have a low vitamin B12 level, injections can go a long way toward improving your health and well being. But if your B12 level is normal, don't fall for claims that B12 Injections for Energy: Benefits and How It Works AZ IV Medics Methylcobalamin is the active form of Vitamin B12 that can be used as a dietary supplement injection in order to:, , 1. Increase energy levels Vitamin B12 helps to utilize fats & carbohydrates for Benefits of a Vitamin B12 Injection, Vitamin B12 injections are commonly used for people who are deficient, struggle to absorb B12 from tablets, or require a faster and more effective boost., Helps