B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 Shots Phoenix Arcadia, Scottsdale, Tempe & Glendale Cobalamin (vitamin B12) and Folate Deficiency Province of British Columbia Not all supplements work the same and when you take them can make a big difference! Swipe through this supplement guide to learn the best timing, how to take them safely, and B12 Shots: Vitamin B12 Injections Benefits, Uses, Risks Dr. Axe