Vitamin B12 Injection Side Effects and Safety Best B12 Shots in Chicago & Naperville 2026 Are heavy periods holding you back? From pain relief to iron supplements, hear from Dr. Rachel Miller, pediatric gynecologist, about the different methods that can be used to treat heavy menstrual bleeding. 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