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AIM: Vitamin D may be involved in allergy development, but there is conflicting evidence. We investigated if dietary intake of vitamin D and levels of 25OHD in serum differed between allergic and non-allergic adolescents and if serum 25OHD correlated with dietary intake of vitamin D or season of blood sampling.
METHODS: Serum 25-hydroxy vitamin D (25OHD) levels were analysed in 13-year-old subjects with atopic eczema (n=55), respiratory allergy (n=55) or no allergy (n=55). Intake of fat-containing foods was assessed by food frequency questionnaires and total daily vitamin D intake was calculated. Logistic regression was used to adjust for gender, parental allergy and time of blood sampling.
RESULTS: Subjects with atopic eczema or respiratory allergy did not differ from non-allergic controls regarding serum 25OHD levels or calculated vitamin D intake. Subjects sampled in the autumn had significantly higher levels of serum 25OHD than subjects sampled in the winter or spring. Serum 25OHD levels correlated to consumption of vitamin D fortified lean milk (p=0.001).
CONCLUSION: The findings suggest no association between allergy and 25OHD levels in serum or vitamin D intake in adolescents. Serum 25OHD levels correlated to intake of vitamin D fortified lean milk. This article is protected by copyright. All rights reserved.
Authors: Barman M, Jonsson K, Hesselmar B, Wold AE, Sandberg AS, Sandin A
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