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 at Olympia Ever wonder why B12 shots are red? Here's the scoop! B12 injections naturally have a deep red color due to the presence of the cobalt corrin complex, a key component of What Happens If You Inject B12 Wrong: 6 Red Flags