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The Relationship between Zinc Intake and Serum/Plasma Zinc Concentration in Children: A Systematic Review and Dose-Response Meta-Analysis

Journal

NUTRIENTS
Volume 4, Issue 8, Pages 841-858

Publisher

MDPI
DOI: 10.3390/nu4080841

Keywords

zinc; children; serum zinc; systematic review; dose-response; dietary recommendations; EURRECA

Funding

  1. Commission of the European Communities, specific Research, Technology and Development (RTD) Programme Quality of Life and Management of Living Resources, within the Sixth Framework Programme [036196]

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Recommendations for zinc intake during childhood vary widely across Europe. The EURRECA project attempts to consolidate the basis for the definition of micronutrient requirements, taking into account relationships among intake, status and health outcomes, in order to harmonise these recommendations. Data on zinc intake and biomarkers of zinc status reported in randomised controlled trials (RCTs) can provide estimates of dose-response relationships which may be used for underpinning zinc reference values. This systematic review included all RCTs of apparently healthy children aged 1-17 years published by February 2010 which provided data on zinc intake and biomarkers of zinc status. An intake-status regression coefficient ((beta) over cap) was calculated for each individual study and calculated the overall pooled (beta) over cap and SE ((beta) over cap) using random effects meta-analysis on a double log scale. The pooled dose-response relationship between zinc intake and zinc status indicated that a doubling of the zinc intake increased the serum/plasma zinc status by 9%. This evidence can be utilised, together with currently used balance studies and repletion/depletion studies, when setting zinc recommendations as a basis for nutrition policies.

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