Asthma/AllergyFlavonoids (Soy)

Soy and the risk of hay fever

Researchers from the Gifu University Graduate School of Medicine in Japan examined the relationship between soy isoflavone and the risk of cedar pollinosis (hay fever) — the most common seasonal allergic rhinitis in Japan.

First, the details.

  • 11,229 adults with no history of cancer or allergic diseases completed questionnaires about symptoms related to cedar pollinosis.
  • Diet, including soy isoflavone intake, was determined using a food questionnaire.

And, the results.

  • During 10 years of follow-up, 931 people reported cedar pollinosis.
  • There was no significant association between soy isoflavone intake and risk of cedar pollinosis after controlling for potential confounding factors.

The bottom line?
The authors concluded the findings do not support an association between soy isoflavone intake and risk of cedar pollinosis.

7/4/08 20:23 JR

Hi, I’m JR

John Russo, Jr., PharmD, is president of The MedCom Resource, Inc. Previously, he was senior vice president of medical communications at, a complementary and alternative medicine website.