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Bioavailability of minerals in legumes

  • Ann-Sofie Sandberg (a1)
Abstract

The mineral content of legumes is generally high, but the bioavailability is poor due to the presence of phytate, which is a main inhibitor of Fe and Zn absorption. Some legumes also contain considerable amounts of Fe-binding polyphenols inhibiting Fe absorption. Furthermore, soya protein per se has an inhibiting effect on Fe absorption. Efficient removal of phytate, and probably also polyphenols, can be obtained by enzymatic degradation during food processing, either by increasing the activity of the naturally occurring plant phytases and polyphenol degrading enzymes, or by addition of enzyme preparations. Biological food processing techniques that increase the activity of the native enzymes are soaking, germination, hydrothermal treatment and fermentation. Food processing can be optimized towards highest phytate degradation provided that the optimal conditions for phytase activity in the plant is known. In contrast to cereals, some legumes have highest phytate degradation at neutral or alkaline pH. Addition of microbial enzyme preparations seems to be the most efficient for complete degradation during processing. Fe and Zn absorption have been shown to be low from legume-based diets. It has also been demonstrated that nutritional Fe deficiency reaches its greatest prevalence in populations subsisting on cereal- and legume-based diets. However, in a balanced diet containing animal protein a high intake of legumes is not considered a risk in terms of mineral supply. Furthermore, once phytate, and in certain legumes polyphenols, is degraded, legumes would become good sources of Fe and Zn as the content of these minerals is high.

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Corresponding author
*Corresponding author: Dr Ann-Sofie Sandberg, tel +46 31 33 55 630, fax +46 31 83 37 82, email ann-sofie.sandberg@fsc.chalmers.se
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L Davidsson , P Galan , P Kastenmayer , F Cherouvrier , M-A Juillerat , S Jercberg & RF Hurrell (1994) Iron bioavailability studied in infants: The influence of phytic acid and ascorbic acid in infant formulas based on soy isolate. Pediatric Research 36, 816822.

M Fredrikson , ML Alminger , NG Carlsson & A-S Sandberg (2001 a) Phytate content and phytate degradation by endogenous phytase in pea (Pisum sativum). Journal of the Science of Food and Agriculture 81, 11391144.

M Fredrikson , T Andlid , A Haikara & AS Sandberg (2002 b) Phytate degradation by microorganisms in synthetic media and pea flour. Journal of Applied Microbiology 93, 197204.

M Fredrikson , P Biot , ML Alminger , NG Carlsson & AS Sandberg (2001 b) Production process for high-quality pea-protein isolate, with low content of oligosaccharides and phytate. Journal of Agricultural and Food Chemistry 49, 12081212.

E Gustafsson & A-S Sandberg (1995) Phytate reduction in brown beans (Phaseolus vulgaris L). Journal of Food Science 60, 149152, 156.

O Paredes-lopez & GI Harry (1989) Changes in selected chemical and antinutritional components during tempeh preparationusing fresh and hardened common beans. Journal of Food Science 54, 968970.

DK Salunkhe , SJ Jadhav , SS Kadam & JK Chavan (1982) Chemical, biochemical, and biological significance of polyphenols in cereals and legumes. CRC Critical Reviews in Food Science and Nutrition 17, 277305.

AS Sandberg (2000) Developing functional ingredients. A case study. In Functional Foods, pp. 209232 [ GR Gibson and CM Williams editors]. Cambridge and Boca Raton, Florida: Woodhead Publishing and CRC Press.

AS Sandberg & U Svanberg (1991) Phytate hydrolysis by phytase in cereals. Effects on in vitro estimation of iron availability. Journal of Food Science 56, 13301333.

JJ Scott (1991) Alkaline phytase activity in nonionic detergent extracts of legume seeds. Plant Physiology 95, 12981301.

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British Journal of Nutrition
  • ISSN: 0007-1145
  • EISSN: 1475-2662
  • URL: /core/journals/british-journal-of-nutrition
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