Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide B12 Injections for Energy: Benefits and How It Works AZ IV Medics Your body needs vitamin B12 to keep blood cells healthy and to make your nerves work right. But what happens when you run low? Here are some signs: https: wb.md 3OUOc1J B12 as a Treatment for Peripheral Neuropathic Pain: A Systematic Review