How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust B12 Injection sites + How to use B12 Shots Safely What does a B12 shot do, and how does it affect the body? Boost Your Energy: B12 Vitamin Shot Benefits Modern Body Clinic Gilbert AZ Benefits of B12 Injections for Optimal Health 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