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What Does Iron Do? Your body needs iron to make hemoglobin, the part of your red blood cells that carries oxygen throughout your body. Every cell in your body needs iron to make energy. Not eating enough iron can lead to iron-deficiency anemia. People with a higher risk for iron-deficiency anemia include:
Hemoglobin and Functions of Iron. Iron is an essential element for blood production. About 70 percent of your body's iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin. Hemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues. Myoglobin, in muscle cells, accepts, stores, transports and releases oxygen.