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

Mortensen, C, Damsgaard, CT, Hauger, H, Ritz, C, Lanham-New, SA, Smith, Taryn, Hennessy, A, Dowling, K, Cashman, KD, Kiely, M and Mølgaard, C (2016) Estimation of the dietary requirement for vitamin D in white children aged 4–8 y: a randomized, controlled, dose-response trial American Journal of Clinical Nutrition, 104 (5). pp. 1310-1317.

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Abstract

Background: 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. Objective: 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. Design: 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. Results: 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. Conclusions: 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.

Item Type: Article
Subjects : Nutrition
Authors :
NameEmailORCID
Mortensen, CUNSPECIFIEDUNSPECIFIED
Damsgaard, CTUNSPECIFIEDUNSPECIFIED
Hauger, HUNSPECIFIEDUNSPECIFIED
Ritz, CUNSPECIFIEDUNSPECIFIED
Lanham-New, SAs.lanham-new@surrey.ac.ukUNSPECIFIED
Smith, Tarynt.j.smith@surrey.ac.ukUNSPECIFIED
Hennessy, AUNSPECIFIEDUNSPECIFIED
Dowling, KUNSPECIFIEDUNSPECIFIED
Cashman, KDUNSPECIFIEDUNSPECIFIED
Kiely, MUNSPECIFIEDUNSPECIFIED
Mølgaard, CUNSPECIFIEDUNSPECIFIED
Date : 12 October 2016
Identification Number : 10.3945/​ajcn.116.136697
Copyright Disclaimer : Copyright (C) 2016 by the American Society for Nutrition
Uncontrolled Keywords : children dose-response ODIN randomized controlled trial recommendations requirement vitamin D
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:48
Last Modified : 12 Jul 2017 11:53
URI: http://epubs.surrey.ac.uk/id/eprint/829297

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