B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 Injections Needles B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B12 Injections Dosage and Frequency IVBoost Not all shots are the same here's a guide Injections are a fast, effective way to deliver medications, nutrients, and vaccines directly into the bodybut not all injections are the