B12 Injections: How Often Should You Take Them? Invigor Medical B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B12 shots: Uses, benefits, and side effects Is hydroxocobalamin (B12) 1mg injection every 3 months indefinitely an effective treatment for vitamin B12 deficiency? How Often Should You Get B12 Injections? A Realistic Schedule ELLEMES Medical Spa Cyanocobalamin (B12) Injection 1000 mcg mL, Multiple Dose Vial 30 mL McGuff