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Ethnic Differences in Iron Status.

Wanhui Kang1, Alexa Barad1, Andrew G Clark2,3

  • 1Division of Nutritional Sciences, Cornell University, Ithaca, NY, USA.

Advances in Nutrition (Bethesda, Md.)
|May 19, 2021
PubMed
Summary
This summary is machine-generated.

Human iron absorption has no excretory pathway, leading to deficiency or overload. Genetic factors and ethnicity significantly influence iron status, impacting disease risk and requiring population-specific interventions.

Keywords:
ethnicitygeneticshemochromatosisironiron deficiencyiron overloadmutationnutrigenomicspolymorphism

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Area of Science:

  • Nutritional genomics
  • Human metabolism
  • Genetic epidemiology

Background:

  • Humans lack a regulated pathway for excess iron excretion, predisposing to iron deficiency or overload.
  • Iron overload can increase the risk of chronic diseases like cirrhosis, diabetes, and heart failure.
  • Current understanding explains only ~30% of iron absorption variability, with genetics playing a significant role.

Purpose of the Study:

  • To review genetic variants associated with iron status alterations.
  • To highlight the influence of ethnicity on iron deficiency and overload risks.
  • To explore ethnic differences in iron metabolism and related disease susceptibility.

Main Methods:

  • Literature review of genetic variants affecting iron status.
  • Analysis of existing data using linear mixed-effects models.
  • Exploration of ethnic variations in iron status biomarkers.

Main Results:

  • East Asians exhibit higher iron status indicators (serum ferritin, transferrin saturation, hemoglobin) than Europeans, African Americans, or South Asians.
  • African Americans show significantly lower hemoglobin concentrations compared to other ethnic groups.
  • Genetic factors contribute significantly to interindividual variability in iron absorption.

Conclusions:

  • Ethnic background significantly influences iron status biomarkers and associated health risks.
  • Further research into the genetic basis of ethnic differences in iron metabolism is crucial.
  • Population-specific recommendations and personalized nutrition are needed for iron-related disorders.