B12 Injections: Who Should Get Them and How Long Do They Last? Best B12 Shots in Chicago & Naperville 2026 B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics 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