School meals with fish affect serum vitamin d in 8-11 year-old children - preliminary results from the opus school meal study

R. A. Petersen, C. T. Damsgaard, S.-M. Dalskov, L. B. Sørensen, M. F. Hjorth, R. Andersen, Inge Tetens, H. Krarup, C. Ritz, A. Astrup, K. F. Michaelsen, C. Mølgaard

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Abstract

Background and aims
Few foods contain vitamin D and many children fail to meet recommended intakes, including Danish children. This may promote low serum concentrations, particularly as cutaneous vitamin D production is negligible during winter/spring at Northern latitudes.
Aims
To examine if New Nordic Diet (NND) school meals with two weekly fish servings affect serum 25-hydroxyvitamin D (25(OH)D) and bone in children.
Methods
The OPUS (Optimal well-being, development and health for Danish children through a healthy NND) School Meal Study was a cluster-randomized controlled cross-over intervention. A total of 784 third and fourth graders received NND school meals for 3 months and habitual packed lunch for 3 months. Dietary intake and serum 25(OH)D was measured, and DXA-scans performed, at baseline and after each dietary period.
Results
Intake of fatty fish (? 3.6-7.2 g/d) and vitamin D (? 0.3-1.1 µg/d) was higher after intervention- than control-period. The NND effect was modified by season, i.e, in November/December and January/February NND resulted in higher 25(OH)D than the control diet, whereas in March/April NND resulted in lower (p<0.05). In January/February NND resulted in higher Total Body Less Head size-adjusted Bone Mineral Content than the control diet, but lower in May/June (p<0.05). No observed effects on Bone Area and Bone Mineral Density.
Conclusions
Fish-containing NND school meals affected vitamin D intake and ?status, and seemed to mitigate children?s decreases in 25(OH)D and BMC during winter months at Northern latitudes. A carry-over effect may be suspected in the March/April samplings. The OPUS study was supported by a grant from the Nordea Foundation.
Original languageEnglish
Publication date2014
Number of pages1
Publication statusPublished - 2014
EventThe 2nd international conference on nutrition and growth - Barcelona, Spain
Duration: 30 Jan 20141 Feb 2014
Conference number: 2

Conference

ConferenceThe 2nd international conference on nutrition and growth
Number2
CountrySpain
CityBarcelona
Period30/01/201401/02/2014

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