Vitamin B12 shots: Uses, benefits, and side effects Vitamin B12 deficiency Guide: Causes, Symptoms and Treatment Options Medinaz Vitamin B12 Deficiency Vitamin B12 deficiency happens when the body does not have enough vitamin B12. Vitamin B12 is important for making healthy red blood cells and Wow guys, you've been gate keeping!! Got my first B12 injection last week and it's like I am awake for the first time since having kids 20 years ago It's B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics