Iron deficiency anemia is a condition where the body does not have sufficient iron to produce enough hemoglobin (Hb) for healthy red blood cells. It is characterized by the presence of microcytosis, or small red blood cells (RBCs), as a result of decreased Hb production. The Hb molecule is made with iron, and is a required component of RBCs; within the Hb molecule, it is the iron atoms that carry oxygen to the body’s tissues.[1]
What is iron deficiency anemia?
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•Last Updated: May 16, 2025
Iron deficiency anemia is a condition caused by insufficient iron, which leads to decreased hemoglobin production and results in small red blood cells. Hemoglobin, which contains iron, is essential for transporting oxygen to the body's tissues.