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Anemia is a low level of healthy red blood cells (RBCs). RBCs carry oxygen from the lungs to the rest of the body. When red blood cells are low, the body does not get enough oxygen.
There are several specific types of anemia, including:
The main causes of anemia are:
Risk Factors TOP
Anemia is more common in woman and woman who are pregnant. It is also more common in older adults who are sick and infants less than 2 years old.
Other factors that may increase the risk of anemia include:
Anemia may cause:
You will be asked about your symptoms and health history. A physical exam will be done. Blood tests will show how many RBCs there are and if they are healthy. Other tests may be needed to look for causes.
The goal of treatment is to increase healthy RBCs. The exact steps will depend on the cause. Underlying causes will be treated. Options to help increase the level of RBCs include:
Foods rich in iron, vitamin C, vitamin B12, and folate may be recommended. Vitamins or iron supplements may also be added.
Medicine may help to increase the amount of RBCs the body can make.
Blood Transfusions TOP
Healthy blood from a donor may be needed. It will increase RBCs quickly. The effect will not last if the cause of anemia is not treated.
A diet rich in iron and vitamins may help to prevent some types of anemia.
Iron Disorders Institute
National Heart, Lung, and Blood Institute
Canadian Blood Services
Anemia—differential diagnosis. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T240897/Anemia-differential-diagnosis . Updated January 21, 2016. Accessed September 29, 2017.
Explore anemia. National Heart, Lung, and Blood Institute website. Available at: https://www.nhlbi.nih.gov/health/health-topics/topics/anemia. Updated May 18, 2012. Accessed September 29, 2017.
Guralnik JM, Eisenstaedt RS, Ferrucci L, Klein HG, Woodman RC. Prevalence of anemia in persons 65 years and older in the United States: evidence for a high rate of unexplained anemia. Blood. 2004;104(8):2263-2268.
Nissenson AR, Goodnough LT, Dubois RW. Anemia: not just an innocent bystander? Arch Intern Med. 2003;163(12):1400-1404.
Last reviewed September 2019 by
EBSCO Medical Review Board
Marcin Chwistek, MD
2545 Park Plaza
Telephone: (615) 344-6060
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