​Dr. Dean: Treatment for anemia depends on the underlying cause. If anemia is due to B12 deficiency or folate deficiency, replacement of these vitamins is needed. If anemia is due to gastrointestinal bleeding, a referral for an EGD and colonoscopy is needed to locate the source of [the bleeding] and stop it. If anemia is due to iron deficiency, you can take iron pills, liquid iron solution, or intravenous iron.