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Iron absorption in rats increased by yeast glucan
Ta Thi Tuyet Mai1, Kaori Igarashi, Rieko Hirunuma
1Department of Food and Nutrition, Japan Women's University, Tokyo.
Bioscience, Biotechnology, and Biochemistry
|October 2, 2002
Summary
Brewer's yeast glucan significantly enhances iron absorption in anemic rats. This component of yeast cell walls, not mannan, is key to increasing 59Fe uptake, offering insights into nutritional iron bioavailability.
Area of Science:
- Nutritional Science
- Animal Nutrition
- Biochemistry
Background:
- Iron deficiency anemia remains a significant global health concern.
- Dietary factors play a crucial role in iron absorption and bioavailability.
- Brewer's yeast and its components are explored for potential health benefits.
Purpose of the Study:
- To investigate the impact of brewer's yeast cell walls, glucan, and mannan on iron absorption in anemic rats.
- To identify the specific component responsible for enhanced iron uptake.
Main Methods:
- Anemic rats were administered radioactive iron (59Fe).
- Groups received brewer's yeast cell walls, glucan, mannan, or a glucan-mannan mixture.
- Iron absorption and incorporation into blood and small intestines were measured.
Main Results:
- Glucan and yeast cell walls increased 59Fe uptake into the blood compared to controls.
- Glucan significantly enhanced 59Fe incorporation into the small intestine.
- Glucan was identified as the primary component responsible for increased iron absorption.
Conclusions:
- Brewer's yeast glucan is the main component that enhances iron absorption.
- Dietary glucan may be beneficial for improving iron status in conditions of deficiency.
- Further research can explore glucan's role in human iron bioavailability.