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 body but not all injections are the same. How to Give a B12 Injection: Step By Step Instructions How to Give a B12 Injection: Step By Step Instructions Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust What is the best route for administering vitamin B12: intramuscular injection or subcutaneous injection? Choosing the Right Needle and Syringe for B12 Injections: A Complete Guide