Iron deficiency and iron deficiency anemia remain a major and global public health problem that affects particularly infants, young children, and women of childbearing age in developing countries. The prevalence of iron deficiency anemia is still common in industrialized countries despite efforts to improve public awareness and strengthen programs for the prevention and control of iron deficiency. The most common risk factors for iron deficiency in early childhood are rapid growth, perinatal risk factors, poor dietary intake, and gastrointestinal blood loss due to excessive consumption of cow’s milk. Iron deficiency and iron deficiency anemia cause a wide variety of symptoms and changes in many different tissues. The most concerning consequ...