Cyanocobalamin (B12) Injection 1000 mcg mL, Multiple Dose Vial 30 mL McGuff Vitamin B12: How important Is the Vitamin to Your Health? FCP Live In Treatment with high dose vitamin B12 been shown to be safe Has anybody heard of high dose B12 injections slowing down ALS? If anybody is taking them, would like to know if it works and if the shots give you more energy. B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics