Vastus Lateralis Intramuscular Injection Everything You Need To Know Dr. Nabil Ebraheim HOW TO SELF INJECT B12 AT HOME with Dr. Tyler Rogers , , If youve been prescribed vitamin B12 shots or exploring at home wellness, this step by step guide will walk you through how to do your own B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 Shot: Step by Step Guide for Self Injection TikTok Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief Common IM Injection Sites Deltoid (Upper Arm) Location: About 23 finger widths below the acromion process (shoulder bone). Best for: Vaccines and small volume injections (1 mL). Notes: Easy to access but limited