Iron deficiency anemia is the most common form of anemia.
Red blood cells bring oxygen to the body's tissues. Healthy red blood cells are made in your bone marrow. Red blood cells move through your body for 3 to 4 months. Parts of your body then remove old blood cells.
Iron is a key part of red blood cells. Without iron, the blood cannot carry oxygen effectively. Your body normally gets iron through your diet and by re-using iron from old red blood cells.
You get iron deficiency anemia when your body's iron stores run low. You can get iron deficiency if:
You lose more blood cells and iron than your body can replace
Your body does not do a good job of absorbing iron
Your body is able to absorb iron, but you are not eating enough foods with iron in them
Your body needs more iron than normal (such as if you are pregnant or breastfeeding)
Iron loss can be due to bleeding. Common causes of bleeding are:
Taking iron supplementsand eating iron-rich foods are important parts of treating iron deficiency anemia. However, you and your health care provider must first search for the cause of your anemia.
Iron supplements (most often ferrous sulfate) are needed to build up the iron stores in your body. Most of the time, your doctor or nurse will measure your iron levels before starting supplements.
Patients who cannot take iron by mouth can take it through a vein (intravenous) or by an injection into the muscle.
Pregnant and breastfeeding women will need to take extra iron because their normal diet usually will not provide the amount they need.
The hematocrit should return to normal after 2 months of iron therapy. However, keep taking iron for another 6 - 12 months to replace the body's iron stores in the bone marrow.
Iron-rich foods include:
Chicken and turkey
Dried lentils, peas, and beans
Meats (liver is the highest source)
Other sources include:
Raisins, prunes, and apricots
Spinach, kale, and other greens
With treatment, the outcome is likely to be good. However, it does depend on the cause. Usually, blood counts will return to normal in 2 months.
Calling your health care provider
Call for an appointment with your health care provider if:
You have symptoms of this disorder
You notice blood in your stool
Everyone's diet should include enough iron. Red meat, liver, and egg yolks are important sources of iron. Flour, bread, and some cereals are fortified with iron. If you aren't getting enough iron in your diet (uncommon in the United States), take iron supplements.
During periods when you need extra iron (such as pregnancy and breastfeeding), increase the amount of iron in your diet or take iron supplements.
Mabry-Hernandez IR. Screening for iron deficiency anemia--including iron supplementation for children and pregnant women. Am Fam Physician. 2009 May 15;79(10):897-8.
Alleyne M, Horne MK, Miller JL. Individualized treatment for iron-deficiency anemia in adults. Am J Med. 2008;121:943-948..
Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.