Iron is a mineral found in every cell of the body. Iron is considered an essential mineral because it is needed to make part of blood cells. Human iron metabolism is the set of chemical reactions maintaining human homeostasis of iron. A well-balanced diet contains sufficient iron to meet body requirements. About 10% of the normal 10 to 20 mg of dietary iron is absorbed each day, and this is sufficient to balance the 1 to 2 mg daily losses from desquamation of epithelia. Greater iron utilization via growth in childhood, greater iron loss with minor hemorrhages, menstruation in women, and greater need for iron in pregnancy will increase the efficiency of dietary iron absorption to 20%.