Type

Journal Article

Authors

Christian Mølgaard
Mairead Kiely
Kevin D Cashman
Kirsten Dowling
Áine Hennessy
Taryn J Smith
Susan A Lanham-New
Christian Ritz
Hanne Hauger
Camilla T Damsgaard
and 1 others

Subjects

Pharmacology

Topics
nonlinear model vitamin d vitamin d supplementation liquid chromatography tandem mass spectrometry vitamin d deficiency randomized controlled trial young children serum 25 hydroxyvitamin d

Estimation of the dietary requirement for vitamin D in white children aged 4-8 y: a randomized, controlled, dose-response trial. (2016)

Abstract Children in northern latitudes are at high risk of vitamin D deficiency during winter because of negligible dermal vitamin D3 production. However, to our knowledge, the dietary requirement for maintaining the nutritional adequacy of vitamin D in young children has not been investigated. We aimed to establish the distribution of vitamin D intakes required to maintain winter serum 25-hydroxyvitamin D [25(OH)D] concentrations above the proposed cutoffs (25, 30, 40, and 50 nmol/L) in white Danish children aged 4-8 y living at 55°N. In a double-blind, randomized, controlled trial 119 children (mean age: 6.7 y) were assigned to 0 (placebo), 10, or 20 μg vitamin D3/d supplementation for 20 wk. We measured anthropometry, dietary vitamin D, and serum 25(OH)D with liquid chromatography-tandem mass spectrometry at baseline and endpoint. The mean ± SD baseline serum 25(OH)D was 56.7 ± 12.3 nmol/L (range: 28.7-101.4 nmol/L). Serum 25(OH)D increased by a mean ± SE of 4.9 ± 1.3 and 17.7 ± 1.8 nmol/L in the groups receiving 10 and 20 μg vitamin D3/d, respectively, and decreased by 24.1 ± 1.2 nmol/L in the placebo group (P < 0.001). A nonlinear model of serum 25(OH)D as a function of total vitamin D intake (diet and supplements) was fit to the data. The estimated vitamin D intakes required to maintain winter serum 25(OH)D >30 (avoiding deficiency) and >50 nmol/L (ensuring adequacy) in 97.5% of participants were 8.3 and 19.5 μg/d, respectively, and 4.4 μg/d was required to maintain serum 25(OH)D >40 nmol/L in 50% of participants. Vitamin D intakes between 8 and 20 μg/d are required by white 4- to 8-y-olds during winter in northern latitudes to maintain serum 25(OH)D >30-50 nmol/L depending on chosen serum 25(OH)D threshold. This trial was registered at clinicaltrials.gov as NCT02145195.
Collections Ireland -> University College Cork -> PubMed

Full list of authors on original publication

Christian Mølgaard, Mairead Kiely, Kevin D Cashman, Kirsten Dowling, Áine Hennessy, Taryn J Smith, Susan A Lanham-New, Christian Ritz, Hanne Hauger, Camilla T Damsgaard and 1 others

Experts in our system

1
Christian Mølgaard
University College Cork
Total Publications: 6
 
2
Mairead E Kiely
University College Cork
Total Publications: 116
 
3
Kevin D Cashman
University College Cork
Total Publications: 102
 
4
Kirsten G Dowling
University College Cork
Total Publications: 20
 
5
Áine Hennessy
University College Cork
Total Publications: 26
 
6
Christian Ritz
University College Cork