B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics 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 bodybut not all injections are the Injecting substances can expose individuals that use injection drugs to serious harm, but understanding the difference between safer and more harmful sites can help reduce these potential dangers. Here's a breakdown of B12 Injections at Home Safety Guide for Self Administration Infusion For Health How to Inject Into a Vein: 13 Tips and Best Practices