The primary function of Iron in the body is the formation of hemoglobin, the essential oxygen-carrying component of the red blood cell. In combination with protein, iron is carried in the blood to the bone marrow, where with the help of copper, it forms hemoglobin. Red blood cells pick up oxygen from the lungs and distribute it to the rest of the tissues, all of which need oxygen to survive. Iron absorbed into the blood is usually bound to the protein transferrin and goes mainly to the bone marrow, where it can be used to make red blood cells... Full Text