Iron deficiency
is the leading nutritional deficiency in the world and the most common cause of
anemia. It is more common in developing countries,
affecting from 30% to 70% of the population, and it affects about 20% of those
in industrialized countries. In the United States, about 1% of adult men and 2%
to 5% of adult women have an iron deficiency severe enough to cause
anemia.1
Iron deficiency can develop in people of either gender and any age.
But in the United States, iron deficiency is most common in children younger
than 2 (9%) and in menstruating teenagers and women (9% to 11%). Iron
deficiency is also higher among the very poor. Because of blood loss during
menstruation and the demands placed on iron stores by pregnancy, women are more
likely than men to develop iron deficiency anemia. Pregnant women and children
age 5 and younger are at the highest risk for developing complications as a
result of iron deficiency anemia.1