Iron deficiency and B12 deficiency both cause anemia. But the treatment is COMPLETELY different. Taking iron for B12 deficiency? Won't work. Taking B12 for iron deficiency? Won't work. Swipe to learn the B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 INJECTION Infusion Services South Texas Family and Urgent Care Clinic Infusion Center McAllen B12 Shots vs. IV Infusions: What is the difference? Integrative Medicine, Laser and Aesthetics