Abstract
Purpose
Celiac disease, an immunological response triggered by gluten, affects ~1 % of the Western population. Information concerning gluten intake in the general population is scarce. We determined intake of gluten from wheat, barley, rye and oat in the Danish National Survey of Diet and Physical Activity 2005–2008. The study population comprised a random cross-sectional sample of 1494 adults 20–75 years, selected from the Danish Civil Registration System.
Methods
Protein content in wheat, rye, barley and oat was determined from the National Danish Food Composition Table and multiplied with the amount of cereal used in recipes. Amount of gluten was calculated as amount of cereal protein ×0.80 for wheat and oat, ×0.65 for rye and ×0.50 for barley. Dietary intake was recorded daily during seven consecutive days in pre-coded food diaries with open-answer possibilities.
Results
Mean total gluten intake was 10.4 ± 4.4 g/day (10th–90th percentiles; 5.4–16.2 g/day), in men 12.0 ± 4.6 g/day and 9.0 ± 3.4 g/day in women. It was higher among men than among women in all age groups (20–75 years; P < 0.0001); however, this difference was eliminated when adjusting for energy intake. Intake of different gluten sources tended to be higher in men than in women with the exception of gluten from barley. Total gluten intake decreased with increasing age (P < 0.0001) as did gluten intake from wheat (P < 0.0001), whereas intake of gluten from rye (P < 0.0001) and barley (P = 0.001) increased with increasing age, also when adjusted for energy intake or body weight.
Conclusion
This study presents representative population-based data on gluten intake in Danish adults. Total gluten intake decreased with increasing age.
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Acknowledgments
The authors wish to thank Data Warehouse Manager Karsten Kørup and Data Scanning Manager Hanne-Jette Hinsch as well as Majken Ege and Karin Hess Ygil (Division of Nutrition, National Food Institute, Technical University of Denmark) for contributing to the data processing. The authors express their gratitude to all the participating children and parents in DANSDA. The authors conceived the study (C.H., S.H.), designed the analyses of this study (C.H.) and were responsible for the design and collection of data from the Danish National Survey of Diet and Physical Activity (S.F., J.M., E.T.) and responsible for data interpretation and processing (T.C.). C.H. was responsible for analyses of data and writing the manuscript. All authors participated in the discussion of the results and revision of the manuscript. This study was supported by the Danish Strategic Research Council (Project No. 09-06-5149), and the Danish National Survey of Diet and Physical Activity (DANSDA) was financed by the Ministry of Food, Agriculture and Fisheries.
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Hoppe, C., Gøbel, R., Kristensen, M. et al. Intake and sources of gluten in 20- to 75-year-old Danish adults: a national dietary survey. Eur J Nutr 56, 107–117 (2017). https://doi.org/10.1007/s00394-015-1062-3
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DOI: https://doi.org/10.1007/s00394-015-1062-3