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. Choosing the Right Needle and Syringe for B12 Injections: A Complete Guide Best Vitamin B12 Injection Site: Administering B12 Shots B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust