Low vitamin D increases the likelihood that children will develop allergies, according to a paper published in the Journal of Allergy and Clinical Immunology.
Researchers looked at the serum vitamin D levels in blood samples from more than 3,100 children and adolescents and 3,400 adults.
No association between vitamin D levels and allergies was observed in adults. But for children and adolescents, low vitamin D levels correlated with sensitivity to 11 of the 17 allergens tested, including both environmental allergens and food allergens. For example, children who had vitamin D deficiency were 2.4 times more likely to have a peanut allergy than were children with sufficient levels of vitamin D.
Journal of Allergy and Clinical Immunology – February 17, 2011;Epub.