Answer:
== Answer ==
Iron-deficiency anemia occurs when more iron is needed in the diet. This is the most common type of anemia.
Iron deficiency anemia is when there is not enough iron in the blood.
Pernicious anemia mostly affects people over 40 and is a result of vitamin B 12 deficiency.
Sickle-cell anemia is a hereditary blood cell defect that does not respond to vitamin or mineral treatment.