The mineral iron is an essential nutrient for humans because it is part of blood cells, which carry oxygen to all body cells. Iron is essential to the formation of hemoglobin and myoglobin, which carry the oxygen in the blood and the muscle . It also makes up part of many proteins and enzymes in the body.
Iron deficiency is the most common nutritional deficiency worldwide.
Although full-blown anemia is rarely evident, partial deficiency is widespread. If you have constant unusual signs of tiredness , see your doctor. There are many causes of such symptoms. Simply taking an iron supplement may not be the key to renewing your energy. Children between one and four years of age are at risk for developing iron deficiency because of rapid growth and a lack of sufficient iron in their diets unless iron-fortified foods or a supplement is available.