Vitamin B12 shots: Uses, benefits, and side effects If you have a low vitamin B12 level, injections can go a long way toward improving your health and well being. But if your B12 level is normal, don't fall for claims that 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: Hot Shots? Full Guide PA Relief The Benefits Of Vitamin B12 Ugly London. Acupuncture & Chinese Herbal Medicine