Zinc absorption in infants fed iron-fortified weaning food

S J Fairweather-Tait, S G Wharf, T E Fox

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The effect of fortification iron (reduced iron) on zinc absorption from a commercial vegetable-based weaning food was assessed in 11 9-mo-old infants. Each infant was fed a test meal of unfortified or iron-fortified product, labeled extrinsically with 1 mg 67Zn or 70Zn (as citrate), and the next day was fed the second product labeled with the other isotope. A complete fecal collection was carried out for 3-4 d, and the amount of unabsorbed isotope measured by thermal-ionization quadrupole mass spectrometry. Apparent zinc absorption (isotope intake minus fecal excretion, expressed as the % of dose administered) was 31.1 +/- 8.3% (x +/- SD) from the iron-fortified food and 28.6%28.6 +/- 10.5% from the unfortified food. These values were not significantly different, thus iron fortification of the weaning food did not reduce zinc absorption.
Original languageEnglish
Pages (from-to)785-789
Number of pages5
JournalAmerican Journal of Clinical Nutrition
Issue number4
Publication statusPublished - Oct 1995


  • Feces
  • Female
  • Food, Fortified
  • Humans
  • Infant
  • Infant Food
  • Intestinal Absorption
  • Iron
  • Male
  • Spectrophotometry, Atomic
  • Weaning
  • Zinc
  • Zinc Isotopes

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