Choosing the Right Needle and Syringe for B12 Injections: A Complete Guide Safe B12 Injection Guide at Home Step by Step Tutorial YouTube Best Vitamin B12 Injection Site: Administering B12 Shots How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust 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 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.