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 Patient Guide to Self Administering Vitamin B12 Injections Southmead Surgery B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 Injection sites + How to use B12 Shots Safely B12 vitamin Store A Retired RN About Vitamin B12 Injections