Mode of oral iron administration and the amount of iron habitually consumed do not affect iron absorption, systemic iron utilisation or zinc absorption in iron-sufficient infants: a randomised trial

Different metabolic pathways of supplemental and fortification Fe, or inhibition of Zn absorption by Fe, may explain adverse effects of supplemental Fe in Fe-sufficient infants. We determined whether the mode of oral Fe administration or the amount habitually consumed affects Fe absorption and syste...

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Published in:British journal of nutrition 2016-09, Vol.116 (6), p.1046-1060
Main Authors: Szymlek-Gay, Ewa A., Domellöf, Magnus, Hernell, Olle, Hurrell, Richard F., Lind, Torbjörn, Lönnerdal, Bo, Zeder, Christophe, Egli, Ines M.
Format: Article
Language:English
Subjects:
Absorption
Administration, Oral
Babies
Baby foods
Dietary supplements
Double-Blind Method
Drug Interactions
Food fortification
Human and Clinical Nutrition
Humans
Infant
Infant Nutritional Physiological Phenomena
Infants
Iron
Iron - administration & dosage
Iron - pharmacokinetics
Zinc
Zinc - pharmacokinetics
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creator Szymlek-Gay, Ewa A.
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Egli, Ines M.
description Different metabolic pathways of supplemental and fortification Fe, or inhibition of Zn absorption by Fe, may explain adverse effects of supplemental Fe in Fe-sufficient infants. We determined whether the mode of oral Fe administration or the amount habitually consumed affects Fe absorption and systemic Fe utilisation in infants, and assessed the effects of these interventions on Zn absorption, Fe and Zn status, and growth. Fe-sufficient 6-month-old infants (n 72) were randomly assigned to receive 6·6 mg Fe/d from a high-Fe formula, 1·3 mg Fe/d from a low-Fe formula or 6·6 mg Fe/d from Fe drops and a formula with no added Fe for 45 d. Fractional Fe absorption, Fe utilisation and fractional Zn absorption were measured with oral (57Fe and 67Zn) and intravenous (58Fe and 70Zn) isotopes. Fe and Zn status, infection and growth were measured. At 45 d, Hb was 6·3 g/l higher in the high-Fe formula group compared with the Fe drops group, whereas serum ferritin was 34 and 35 % higher, respectively, and serum transferrin 0·1 g/l lower in the high-Fe formula and Fe drops groups compared with the low-Fe formula group (all P
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No intervention effects were observed on Fe absorption, Fe utilisation, Zn absorption, other Fe status indices, plasma Zn or growth. We concluded that neither supplemental or fortification Fe nor the amount of Fe habitually consumed altered Fe absorption, Fe utilisation, Zn absorption, Zn status or growth in Fe-sufficient infants. 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No intervention effects were observed on Fe absorption, Fe utilisation, Zn absorption, other Fe status indices, plasma Zn or growth. We concluded that neither supplemental or fortification Fe nor the amount of Fe habitually consumed altered Fe absorption, Fe utilisation, Zn absorption, Zn status or growth in Fe-sufficient infants. 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source Cambridge Journals Online; Full-Text Journals in Chemistry (Open access)
subjects Absorption
Administration, Oral
Babies
Baby foods
Dietary supplements
Double-Blind Method
Drug Interactions
Food fortification
Human and Clinical Nutrition
Humans
Infant
Infant Nutritional Physiological Phenomena
Infants
Iron
Iron - administration & dosage
Iron - pharmacokinetics
Zinc
Zinc - pharmacokinetics
title Mode of oral iron administration and the amount of iron habitually consumed do not affect iron absorption, systemic iron utilisation or zinc absorption in iron-sufficient infants: a randomised trial
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