The evaluation of absorbable iron in a food is a more accurate way to calculate iron available to the body than by simply recording the total iron content. Reasonable amounts are also found in lamb, pork, and shellfish . 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 carries the oxygen in the blood and the muscle . It 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. Iron needs should be met by breast milk and iron supplement or iron-fortified infant formula.