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Pork meat increases iron absorption from a 5-day fully controlled diet when compared to a vegetarian diet with similar vitamin C and phytic acid content

Published online by Cambridge University Press:  08 March 2007

Mette Bach Kristensen ,
Ole Hels ,
Catrine Morberg ,
Jens Marving ,
Susanne Bügel  and
Inge Tetens
Mette Bach Kristensen*
Affiliation:
Department of Human Nutrition, Centre for Advanced Food Studies (LMC), The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
Ole Hels
Affiliation:
Department of Human Nutrition, Centre for Advanced Food Studies (LMC), The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
Catrine Morberg
Affiliation:
Department of Human Nutrition, Centre for Advanced Food Studies (LMC), The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
Jens Marving
Affiliation:
Department of Clinical Physiology and Nuclear Medicine, Rigshospitalet, University of Copenhagen, Denmark
Susanne Bügel
Affiliation:
Department of Human Nutrition, Centre for Advanced Food Studies (LMC), The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
Inge Tetens
Affiliation:
Department of Human Nutrition, Centre for Advanced Food Studies (LMC), The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
*
*Corresponding author: Dr M. Bach Kristensen, fax +45 35282469, email [email protected]
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Abstract

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Meat increases absorption of non-haem iron in single-meal studies. The aim of the present study was to investigate, over a 5 d period, the potential increasing effect of consumption of pork meat in a whole diet on the fractional absorption of non-haem iron and the total absorption of iron, when compared to a vegetarian diet. A randomised cross-over design with 3×5 d whole-diet periods with diets containing Danish-produced meat, Polish-produced meat or a vegetarian diet was conducted. Nineteen healthy female subjects completed the study. All main meals in the meat diets contained 60 g of pork meat and all diets had high phytic acid content (1250 μmol/d). All main meals were extrinsically labelled with the radioactive isotope 59Fe and absorption of iron was measured in a whole body counter. The non-haem iron absorption from the Danish meat diet was significantly higher compared to the vegetarian diet (P=0·031). The mean fractional absorption of non-haem iron was 7·9 (se1·1), 6·8 (se 1·0) and 5·3 (se 0·6) % for the Danish and Polish meat diets and vegetarian diet, respectively. Total absorption of iron was higher for both meat diets compared to the vegetarian diet (Danish meat diet: P=0·006, Polish meat diet: P=0·003). The absorption ratios of the present study were well in accordance with absorption ratios estimated using algorithms on iron bioavailability. Neither the meat diets nor the vegetarian diets fulfilled the estimated daily requirements of absorbed iron in spite of a meat intake of 180 g/d in the meat diets.

Keywords

Fe59Whole body countingBioavailabilityRadioisotopesWomen
Type
Research Article
Information
British Journal of Nutrition , Volume 94 , Issue 1 , July 2005 , pp. 78 - 83
Copyright
Copyright © The Nutrition Society 2005

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