Luminous B12 Injections What is a B12 injection A B12 injection is a form of supplementation where vitamin B12 is administered directly into the muscle or under the skin, bypassing 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 Yourself Intramuscular (IM) Injections Patients & Families UW Health B12 Shots in Friso, Sherman, Anna. and Sunnyvale, TX A vitamin B12 injection is a shot that delivers B12 directly into your muscle, helping your body absorb it quickly (especially if your body struggles to absorb it from food or tablets) B12 vitamin Store A Retired RN About Vitamin B12 Injections