How to Give a B12 Injection: Step By Step Instructions B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics 8 Reasons to Get a B12 Shot at Texas Heart & Vein Today: Texas Heart and Vein Multispecialty Group: Cardiovascular Doctors The look of surprise never gets old when we do B12 injections and it doesnt hurt , B12 is a great vitamin to increase energy, reduce fatigue, improve nerve function, and so much more! Thank you to Vitamin B12 Injections Q Esthetics Laser Clinic in Toronto