Links studied between vitamin D and allergies

The American Academy of Allergy, Asthma and Immunology released a study last month that indicates a link between vitamin D deficiency and allergies in children and adolescents. The results were published in the February 2011 issue of the academy’s Journal of Allergy and Clinical Immunology. They are an analysis of results from the Centers for Disease Control’s 2005-06 National Health and Nutrition Examination Survey, and they indicate a link between low levels of vitamin D and development of both food and environmental allergies.For children and adolescents, low vitamin D levels were associated with 11 out of 17 specific allergens. The list is diverse and includes peanuts, shrimp, ragweed, oak, dogs, cockroaches and birch.While adults did not show the same allergic risk association, the findings did suggest that allergy sufferers of all ages may also be at greater risk of having a vitamin D deficiency. Previous studies have shown that low levels of vitamin D might lead to exacerbation of asthmatic symptoms. Another study published by the American Academy of Allergy, Asthma and Immunology indicated that taking a vitamin D supplement can decrease the number of asthma attacks associated with upper respiratory infections.According to the federal government’s National Institutes of Health, vitamin D is hard to get from food. It can be found in fish liver oils; fatty fish such as salmon, mackerel and tuna are among the best natural food sources. However, in the United States, dairy products and some types of orange juice are fortified with vitamin D. It is believed that humans need sunlight to “unlock” the benefits of the vitamin no matter how it is ingested.Vitamin D supplements can also be purchased at a pharmacy. The Kent Apothecary can suspend them in flavored oils. The Recommended Dietary Allowance begins at 400 IU for babies. Anyone between the age of 1 and 70 should take 600 IU daily. After the age of 70, the recommended dose increases to 800 IU. For more information on vitamin D and on the part it plays in the development of allergies and asthma, go online to jacionline.org and ods.od.nih.gov/factsheets/vitamind.

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