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Mediterranean Diet: Prenatal Benefits?

Study Suggests Diet by Pregnant Moms Can Reduce Allergy Risk for Their Kids
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WebMD Health News
Reviewed by Louise Chang, MD

Jan. 14, 2008 -- The traditional Mediterranean diet has plenty of benefits for health, but do those benefits extend to the womb?

New research suggests that they do, by reducing a child's risk for asthma and allergies. But an expert on the subject says the study is far from convincing.

In the upcoming issue of the journal Thorax, researchers from Greece's University of Crete report that children born to mothers who closely followed the traditional Mediterranean diet while pregnant were 45% less likely to develop an allergic disease before age 7.

The most protective dietary practices were found to be eating vegetables more than eight times a week during pregnancy, fish more than three times a week, and beans and other legumes more than once a week.

But U.S. government guidelines advise pregnant women to limit their fish consumption to just 12 ounces a week, or roughly two or three servings.

And in newly published guidelines aimed at preventing allergy and asthma in high-risk children, the nutrition committee of the American Academy of Pediatrics (AAP) reported that there is no convincing evidence linking a mother's diet during pregnancy to her child's risk for allergic disease.

Committee chairman Frank R. Greer, MD, tells WebMD that the new study makes many assumptions based on questionable methodology, and does not provide that evidence.

"This study is of interest, but it certainly doesn't prove anything," he says. "The preponderance of evidence tells us that a woman's diet during pregnancy has little impact on her child's risk for allergy and asthma."

Mediterranean Diet and Allergic Disease

The traditional Mediterranean diet includes lots of fruits, vegetables, whole grains, nuts, beans and other legumes.

It also includes moderate amounts of fish, dairy products, poultry and eggs, and very little red meat, according to the American Heart Association.

In an effort to assess the diet's impact on allergy and asthma risk, Leda Chatzi, MD, PhD, and colleagues followed 468 mothers from pregnancy until their children were 6 and a half years old. 

The mothers and their children lived on the Mediterranean island of Menorca, Spain.

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