Iron is absorbed by the duodenum as well as the lower small bowel. When a gastric bypass is performed, the duodenum is bypassed as well. Therefore iron is not absorbed as well after bypass. Women who are menstruating lose blood and therefore iron with each period. These women can't get enough iron in the diet and should take a daily iron supplement. Women who don't menstruate and men will generally get enough iron in the diet to prevent deficiency. These patients should take a multivitamin with iron, but generally don't require a specific iron supplement.
A yellowing of the newer leaves, reflecting a deficiency of iron in the soil; to correct, treat soil with iron sulfate, iron chelate, or foliar sprays containing iron
a common cause of fatigue, especially in menstruating women
Not enough iron in the body, resulting in impaired bone marrow and muscle function. Iron deficiency can lead to iron deficiency anemia because iron is necessary to make hemoglobin, the oxygen-carrying part of red blood cells. Iron deficiency is most common in premature infants, infants and young children who are fed cow's milk or iron-poor formula, menstruating women, and pregnant women.
Lack of adequate iron in the body to support and maintain functioning. It can lead to iron deficiency anemia, a reduction in the concentration of hemoglobin in the red blood cells due to a lack of iron supply to the bone marrow.
A low level of iron in the blood and other tissues that keeps the body from working properly. It occurs when a person has used up the body’s iron stores, and absorbs too little iron from food to cover needs. Iron deficiency is more widespread than anaemia. It is common where the amount of iron in the diet is low, and/or where iron is in a form that is poorly absorbed (i.e. the type of iron found mainly in plant foods).
Iron (Fe) deficiency is a plant disorder also known as ‘lime-induced chlorosis’. A deficiency in the soil is rare. Iron can be unavailable if pH is too high or if the soil is waterlogged, or has been overfertilised with phosphorus.
For a more specific and detailed discussion of anemia caused by iron deficiency, see the Wikipedia article iron deficiency anemia.
