Vitamin D biomarkers for Dietary Reference Intake development in children: A systematic review and meta-analysis

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dc.contributor.authorCashman, Kevin D.
dc.contributor.authorRitz, Christian
dc.contributor.authorCarlin, Aoife
dc.contributor.authorKennedy, Mairead
dc.date.accessioned2022-01-28T09:36:09Z
dc.date.available2022-01-28T09:36:09Z
dc.date.issued2021-10-23
dc.date.updated2022-01-28T09:23:56Z
dc.description.abstractBackground: Circulating 25-hydroxyvitamin D [25(OH)D] has been the accepted vitamin D exposure/intake biomarker of choice within recent DRI exercises, but use of other vitamin D–related biomarkers as well as functional markers has been suggested. These may be of value in future vitamin D DRI exercises, such as the FAO/WHO's one for young children. Objectives: To systematically review the usefulness of circulating 25(OH)D, parathyroid hormone (PTH), free and bioavailable 25(OH)D, C3-epimer of 25(OH)D, vitamin D3, 24,25-dihydroxyvitamin D [24,25(OH)2D], and bone turnover markers and calcium absorption as vitamin D biomarkers for DRI development in children. Methods: Methods included structured searches of published articles, full-text reviews, data extraction, quality assessment, meta-analysis, and random-effects meta-regression. Results: Fifty-nine vitamin D supplementation randomized controlled trials (RCTs) were included (39 in infants/children as the priority group and the remainder in adults since pediatric studies were absent/limited). Vitamin D supplementation significantly raised circulating 25(OH)D in infants and children, but the response was highly heterogeneous [weighted mean difference (WMD): 27.7 nmol/L; 95% CI: 22.9, 32.5; 27 RCTs; I2 = 93%]. Meta-regression suggested an increase by 1.7 nmol/L (95% CI: 0.7, 2.6) in serum 25(OH)D per each 100-IU increment in vitamin D intake (P = 0.0005). Vitamin D supplementation had a significant effect on circulating 24,25(OH)2D (WMD: 3.4 nmol/L; 95% CI: 2.4, 4.5; 13 RCTs; I2 = 95%), with a dose–response relation (+0.15 nmol/L per 100 IU; 95% CI: –0.01, 0.29). With circulating PTH, although there was a significant effect of vitamin D on WMD (P = 0.05), there was no significant dose–response relation (P = 0.32). Pediatric data were too limited in relation to the usefulness of the other biomarkers. Conclusions: Circulating 25(OH)D may be a useful biomarker of vitamin D exposure/intake for DRI development in infants and children. Circulating 24,25(OH)2D also showed some promise, but further data are needed, especially in infants and children.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCashman, K. D., Ritz, C., Carlin, A. and Kennedy, M. (2021) 'Vitamin D biomarkers for Dietary Reference Intake development in children: A systematic review and meta-analysis', American Journal of Clinical Nutrition. doi: 10.1093/ajcn/nqab357en
dc.identifier.doi10.1093/ajcn/nqab357en
dc.identifier.eissn1938-3207
dc.identifier.issn0002-9165
dc.identifier.journaltitleAmerican Journal of Clinical Nutritionen
dc.identifier.urihttps://hdl.handle.net/10468/12500
dc.language.isoenen
dc.publisherOxford University Pressen
dc.rights© 2021, the Authors. Published by Oxford University Press on behalf of the American Society for Nutrition. All rights reserved.en
dc.subjectVitamin D exposureen
dc.subjectBiomarkeren
dc.subject25-hydroxyvitamin Den
dc.subjectSystematic reviewen
dc.subjectChildrenen
dc.titleVitamin D biomarkers for Dietary Reference Intake development in children: A systematic review and meta-analysisen
dc.typeArticle (peer-reviewed)en
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