What Is Iron Deficiency And How Can You Get Iron Deficiency Anemia? Iron deficiency is the most common nutritional disorder affecting about 20-25% of the world’s population, predominantly children and women. Iron deficiency occurs when your body doesn’t have enough of the mineral iron. Your body needs iron to make hemoglobin, a protein in red.. Visit at: https://dtapclinic.com.my/iron-deficiency-anemia/