In the News
Vitamins & Minerals
By Maureen Williams, ND
The prevalence of allergies and asthma have been on the rise over the past three decades, a trend encompassing all age groups, leading scientists to search for reasons. Declining air quality—both indoors and outside—is one widely examined possible culprit. Now evidence from a recent report from the National Health and Nutrition Examination Survey (NHANES), published in the Journal of Allergy and Clinical Immunology, points to another contributing factor: low levels of folate (the natural form of folic acid) in the body.
Folate linked to less wheezing
When the people in the study were grouped according to their folate levels, those with the lowest levels were the most likely to have high total levels of allergy-related antibodies. They were also the most likely to have high levels of antibodies to specific allergens such as dust mites, cat, and dog, and to have had wheezing in the previous year. In contrast, the people with the highest folate levels had the lowest levels of total and specific allergy-related antibodies and were the least likely to have wheezing.
Nutrition for allergy prevention
More recent research has shed light on folate’s importance in modulating the immune system and preventing inflammatory processes that can lead to diseases such as cardiovascular disease and rheumatoid arthritis. Although it only provides preliminary evidence, the new report from NHANES could lead to a broader understanding of the importance of folate-rich foods in disease prevention. “[Our] findings suggest that dietary folic acid and factors regulating its metabolism might play an important role in the development and perpetuation of allergy and asthma,” the study’s authors said.
Getting enough folate
(J Allergy Clin Immunol 2009;123:1253–9)
Maureen Williams, ND, received her bachelor’s degree from the University of Pennsylvania and her Doctorate of Naturopathic Medicine from Bastyr University in Seattle, WA. She has a private practice on Cortes Island in British Columbia, Canada, and has done extensive work with traditional herbal medicine in Guatemala and Honduras. Dr. Williams is a regular contributor to Healthnotes Newswire.
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