Iron deficiency is a condition characterized by a lack of sufficient iron in the body, leading to inadequate production of hemoglobin and red blood cells. This can result in symptoms such as fatigue, weakness, pallor, and reduced immune function. Iron deficiency is common worldwide, particularly among women of childbearing age, young children, and individuals with poor dietary intake or certain medical conditions. Treatment typically involves iron supplementation and dietary modifications to increase iron intake. If left untreated, iron deficiency can progress to iron deficiency anemia, a more severe condition that can have serious health consequences.