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Functional indicators for assessing zinc deficiency.

Christa L Fischer Walker1, Robert E Black

  • 1Johns Hopkins University Bloomberg School of Public Health, Department of International Health, Baltimore, Maryland 21205, USA. cfischer@jhsph.edu

Food and Nutrition Bulletin
|November 9, 2007
PubMed
Summary
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Zinc supplementation improves child growth and reduces infections like diarrhea and pneumonia. Stunting rates in children under five can effectively indicate population-level zinc deficiency.

Area of Science:

  • Nutrition Science
  • Pediatric Health
  • Public Health

Background:

  • Zinc is a vital micronutrient crucial for child growth and immune system function.
  • Assessing population-level zinc deficiency lacks simple, standardized recommendations.
  • Zinc supplementation trials show benefits for clinical outcomes and growth in children.

Purpose of the Study:

  • To review evidence from randomized trials and correlation studies on zinc supplementation's effects on infectious diseases, growth, and development in children under five.
  • To evaluate the practicality of using trial data for population-level zinc deficiency estimates.
  • To support existing recommendations for using stunting rates to identify zinc deficiency.

Main Methods:

  • Systematic review of randomized controlled trials (RCTs) of zinc supplementation.

Related Experiment Videos

  • Analysis of correlation studies examining zinc status, infectious diseases, and child development.
  • Assessment of growth and infectious disease outcomes in children under 5 years of age.

    • Main Results:

    • Zinc supplementation significantly decreases the incidence and prevalence of diarrhea and pneumonia.
    • Supplementation enhances growth, particularly in children experiencing stunting.
    • Using RCT data for population-level deficiency quantification is impractical and difficult.

    Conclusions:

    • Stunting rates, especially above 20%, serve as a reliable indicator for population-level zinc deficiency in children under five.
    • Zinc supplementation is effective in improving child health outcomes, including growth and reducing infections.
    • The review supports current recommendations linking stunting to zinc deficiency assessment.