What is the best route for administering vitamin B12: intramuscular injection or subcutaneous injection? Safe B12 Injection Guide at Home Step by Step Tutorial YouTube 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. Learn how to administer your own SubQ (subcutaneous) injections at home with confidence. Our step by step guide covers everything you need to know, from preparing your supplies to safely injecting the medication. Our How to Give a B12 Injection: Step By Step Instructions