Iron deficiency is characterized by low levels of iron in the body and can lead to a host of symptoms, including fatigue, weakness, and anemia. It is one of the most common nutritional deficiencies, affecting millions of people worldwide. Iron supplementation is essential to prevent and treat iron deficiency, as it helps to replenish iron stores and prevent further deficiency. Diet, lifestyle changes, and natural remedies can be effective, but in severe cases medical treatment may be necessary to restore iron levels.