Folate-deficiency anemia
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Folate-deficiency anemia

Definition

Folate-deficiency anemia is a decrease in red blood cells (anemia) due to a lack of folate. Folate is a type of B vitamin. It is also called folic acid.

Anemia is a condition in which the body does not have enough healthy red blood cells. Red blood cells provide oxygen to body tissues.

Causes

Folate (folic acid) is needed for red blood cells to form and grow. You can get folate by eating green leafy vegetables and liver. However, your body does not store folate in large amounts. So, you need to eat plenty of folate-rich foods to maintain normal levels of this vitamin. 

In folate-deficiency anemia, the red  blood cells are abnormally large. Such cells are called megalocytes. They are also called megaloblasts. They are seen in the bone marrow. This is why this anemia is also called megaloblastic anemia.

Causes of this type of anemia include:

  • Too little folic acid in your diet
  • Hemolytic anemia
  • Long-term alcoholism
  • Use of certain medications (such as phenytoin [Dilantin], methotrexate, sulfasalazine, triamterene, pyrimethamine, trimethoprim-sulfamethoxazole, and barbiturates)

The following raise your risk for this type of anemia:

  • Alcoholism
  • Eating overcooked food
  • Poor diet (often seen in the poor, the elderly, and people who do not eat fresh fruits or vegetables)
  • Pregnancy

Folic acid is needed to help a baby in the womb grow properly. Too little folic acid during pregnancy may lead to birth defects in a baby. For more information see: Folic acid and birth defect prevention

Symptoms

Exams and Tests

The doctor or nurse will perform a physical exam. Tests that may be done include:

Rarely, a bone marrow examination may be done.

Treatment

The goal is to identify and treat the cause of the folate deficiency.

You may receive folic acid supplements, taken by mouth or given through a vein. If you have low folate levels because of a problem with your intestines, you make need treatment for the rest of your life.

Diet changes can help boost your folate level. Eat more green, leafy vegetables and citrus fruits.

Outlook (Prognosis)

Anemia usually responds well to treatment within 2 months.

Possible Complications

Symptoms of anemia can cause discomfort. In pregnant women, folate deficiency has been associated with neural tube or spinal defects (such as spina bifida) in the infant.

Other, more severe complications may include:

  • Curly graying hair
  • Increased skin color (pigment)
  • Infertility
  • Worsening of heart disease or heart failure

When to Contact a Medical Professional

Call for an appointment with your health care provider if you have symptoms of folate deficiency anemia.

Prevention

Eating plenty of folate rich foods can help prevent this condition.

Experts recommend that women take 400 micrograms (mcg) of folic acid every day before you get pregnant through the first 3 months of pregnancy.

References

Antony AC. Megaloblastic anemias. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 167.


Review Date: 2/8/2012
Reviewed By: Todd Gersten, MD, Hematology/Oncology, Palm Beach Cancer Institute, West Palm Beach, FL. Review provided by VeriMed Healthcare Network. Also reviewed by Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington; David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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