Treatment of anemia depends upon the cause. The most common causes of anemia are- Bleeding , either from wounds, GIT or heavy menstruation, poor dietary intake, chronic illness, kidney disease, pregnancy related anemia, Pernicious anemia because of poor absorption of vitamin B12, Sickle cell anemia, Bone marrow related anemia, Aplastic anemia, Hemolytic anemia or anemia due to thyroid problems, cancers, liver disease or AIDS. So if someone has anemia, the cause should be determined first and treatment should be taken accordingly. Simply consuming iron supplements will not help in all cases. When anemia is due to poor nutrition, iron supplementation does help. Please consult a doctor for the details of investigations and management. Hope this helps you. Take care and regards!