Iron deficiency typically leads to which type of anemia?

• A. Microcytic anemia
• B. Macrocytic anemia
• C. Hemolytic anemia
• D. Normocytic anemia

Answer: (A)

Iron is essential for making hemoglobin, so when iron stores are low, red blood cells are produced with less hemoglobin and less overall hemoglobin content. This leads to smaller-than-normal red blood cells (microcytosis) and pale cells (hypochromia) because each cell has less hemoglobin. As iron deficiency develops, the mean corpuscular volume (MCV) drops, producing microcytic anemia—the typical pattern you’d expect. Early in the process you might see normal-sized cells, but microcytosis becomes evident as the deficiency progresses. Macrocytic anemia would come from problems with DNA synthesis (like B12 or folate deficiency), hemolytic anemia from increased destruction of red cells, and normocytic anemia from other causes such as acute blood loss or anemia of chronic disease, none of which align with the classic iron-deficiency pattern.