Do you follow a vegetarian diet? Did you know that vitamin b12 is mainly present in animal based products so those following a strict plant based are more likely to be deficient in vitamin 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 B12 Injection sites + How to use B12 Shots Safely Why Your Vitamin B12 Injection Remains Prescription Only