Vitamin B 12 Injections Boost Your Immune System B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Feeling tired, foggy, or run down?, It might be time for a B12 injection!, Vitamin B12 plays a key role in your energy, mood, and metabolismand many people are unknowingly low., Top Benefits of Vitamin B12 Deficiency: Causes, Symptoms, and Treatment Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r B12_Deficiency