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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
Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
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2016 (Engelska)Ingår i: British Journal of Nutrition, ISSN 0007-1145, E-ISSN 1475-2662, Vol. 116, nr 6, s. 1046-1060Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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<bold></bold>6 mg Fe/d from a high-Fe formula, 1<bold></bold>3 mg Fe/d from a low-Fe formula or 6<bold></bold>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 (Fe-57 and Zn-67) and intravenous (Fe-58 and Zn-70) isotopes. Fe and Zn status, infection and growth were measured. At 45 d, Hb was 6<bold></bold>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<bold></bold>1 g/l lower in the high-Fe formula and Fe drops groups compared with the low-Fe formula group (all P<0<bold></bold>05). 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. Consumption of low-Fe formula as the only source of Fe was insufficient to maintain Fe stores.

Ort, förlag, år, upplaga, sidor
2016. Vol. 116, nr 6, s. 1046-1060
Nationell ämneskategori
Pediatrik
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URN: urn:nbn:se:umu:diva-126501DOI: 10.1017/S0007114516003032ISI: 000382996100010PubMedID: 27546308Scopus ID: 2-s2.0-84983070182OAI: oai:DiVA.org:umu-126501DiVA, id: diva2:1040449
Tillgänglig från: 2016-10-27 Skapad: 2016-10-10 Senast uppdaterad: 2023-03-24Bibliografiskt granskad

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Szymlek-Gay, Ewa A.Domellöf, MagnusHernell, OlleLind, Torbjörn

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