How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief How to give IM (Intramuscular) injection in buttock or hip easily at home Dorsogluteal Injection How to Give a B12 Injection: Step By Step Instructions Why do nurses and doctors prefer giving injections on the buttocks? How to Give B12 Injections at Home to Yourself PA Relief