How Often Can I Take B12 Injections? Fun Fact Friday! Ever wondered Why is my B12 injection red? All B12s are cobalamins they have a cobalt atom at the center of a special ring shaped molecule called 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 Revitalize Your Energy with Bco and B12 Injections