Beneficial Effect of Dietary Fiber on Iron Bioavailability in Rats

  • Taro Kishida
  • Yota Shimizu
  • Shuhachi Kiriyama
Chapter

Abstract

We examined the effect of demineralized wheat bran (DWB), demineralized onion dietary fiber (DODF) and other dietary fibers (DF) (,experiment 1) and the effect of polystyrene foams (PSF) of various foaming degrees (reciprocal of density)(PSF30, PSF50, PSF90) (experiment 2) on Fe-II or Fe-III bioavailability. Fe bioavailability was evaluated by Hb regeneration. Experiment 1: Both Fe-II and Fe-III were utilized for Hb regeneration at the same rate. The concurrent addition of DODF, DWB or PSF90 significantly improved the regeneration rate of Hb compared to that in rats fed Fe-II alone (Fe-II control). DODF and DWB showed higher values of settling volume in water (SV) than those of other DFs. All DFs did not improve Hb regeneration in rats fed Fe-III. Experiment 2: 5% of PSF50 and PSF90 significantly improved the regeneration rate of Hb compared to that of Fe-II control. The larger foaming degree PSF had, the better improved Fe-II bioavailability. DODF and DWB of high SV, also improved it. Then we suggest that the promoting effect of DF on Fe bioavailability is closely related to the volume of DF exhibited in the intestinal lumen.

Keywords

Dietary Fiber Phytic Acid Wheat Bran Regeneration Rate Intestinal Lumen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • Taro Kishida
    • 1
  • Yota Shimizu
    • 1
  • Shuhachi Kiriyama
    • 1
  1. 1.Laboratory of Nutritional BiochemistryFaculty of Agriculture Hokkaido UniversitySapporoJapan

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