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Related Experiment Videos

Nutritional deficiencies and later behavioural development.

S M Grantham-McGregor1, S P Walker, S Chang

  • 1Centre for International Child Health, Institute of Child Health, 30 Guilford St, London WCI IEH, UK. smcgregor@ich.ucl.ac.uk

The Proceedings of the Nutrition Society
|May 29, 2000
PubMed
Summary
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Early life nutritional deficiencies, like iron and iodine deficiency, can lead to long-term cognitive deficits. Randomized trials confirm iodine deficiency

Area of Science:

  • Nutrition Science
  • Developmental Pediatrics
  • Public Health

Background:

  • Nutritional deficiencies during early development can have lasting impacts.
  • Factors like deficiency severity, duration, developmental stage, and socio-cultural context influence outcomes.
  • Conditions such as reduced breastfeeding, low birth weight, iron (Fe) and iodine (I) deficiency, and protein-energy malnutrition (PEM) are linked to cognitive and academic deficits.

Purpose of the Study:

  • To review the scientific literature on the long-term effects of early-life nutritional deficiencies.
  • To assess the causal relationship between specific deficiencies and long-term developmental outcomes.

Main Methods:

  • Systematic literature review of studies investigating nutritional deficiencies in early life.

Related Experiment Videos

  • Analysis of evidence from observational studies and randomized controlled trials (RCTs).
  • Focus on studies with long-term follow-up to evaluate persistent effects.

    • Main Results:

    • Substantial evidence associates reduced breastfeeding, small-for-gestational-age birth weight, Fe and I deficiency, and PEM with long-term cognitive and school achievement deficits.
    • Confounding factors like poverty and poor health status complicate the interpretation of observational data.
    • RCTs specifically for in-utero iodine deficiency and early childhood PEM provide stronger evidence for causality.

    Conclusions:

    • Iodine deficiency in utero and early childhood has a confirmed long-term negative effect on cognition and development.
    • Protein-energy malnutrition in early childhood likely has a long-term detrimental effect.
    • Establishing causality for other nutritional deficiencies requires more rigorous, long-term randomized trials.