The Influence of Soaking and Germination on the Phytase Activity and Phytic Acid Content of Grains and Seeds Potentially Useful for Complementary Feedin

Authors

  • I. Egli,

    1. Authors Egli, Davidsson, and Hurrell are with the Laboratory for Human Nutrition, Swiss Federal Institute of Technology Zurich, PO Box 474, 8803 Rüschlikon, Switzerland. Author Juillerat is with the Nestlé Research Center, PO Box 44,1000 Lausanne 26, Switzerland and author Barclay is with Nestec Ltd., Av. Nestlé 55, 1800 Vevey, Switzerland. Direct inquiries to author Davidsson (E-mail: lena.davidsson@ilw.agrl.ethz.ch).
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  • L. Davidsson,

    1. Authors Egli, Davidsson, and Hurrell are with the Laboratory for Human Nutrition, Swiss Federal Institute of Technology Zurich, PO Box 474, 8803 Rüschlikon, Switzerland. Author Juillerat is with the Nestlé Research Center, PO Box 44,1000 Lausanne 26, Switzerland and author Barclay is with Nestec Ltd., Av. Nestlé 55, 1800 Vevey, Switzerland. Direct inquiries to author Davidsson (E-mail: lena.davidsson@ilw.agrl.ethz.ch).
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  • M.A. Juillerat,

    1. Authors Egli, Davidsson, and Hurrell are with the Laboratory for Human Nutrition, Swiss Federal Institute of Technology Zurich, PO Box 474, 8803 Rüschlikon, Switzerland. Author Juillerat is with the Nestlé Research Center, PO Box 44,1000 Lausanne 26, Switzerland and author Barclay is with Nestec Ltd., Av. Nestlé 55, 1800 Vevey, Switzerland. Direct inquiries to author Davidsson (E-mail: lena.davidsson@ilw.agrl.ethz.ch).
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  • D. Barclay,

    1. Authors Egli, Davidsson, and Hurrell are with the Laboratory for Human Nutrition, Swiss Federal Institute of Technology Zurich, PO Box 474, 8803 Rüschlikon, Switzerland. Author Juillerat is with the Nestlé Research Center, PO Box 44,1000 Lausanne 26, Switzerland and author Barclay is with Nestec Ltd., Av. Nestlé 55, 1800 Vevey, Switzerland. Direct inquiries to author Davidsson (E-mail: lena.davidsson@ilw.agrl.ethz.ch).
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  • R.F. Hurrell

    1. Authors Egli, Davidsson, and Hurrell are with the Laboratory for Human Nutrition, Swiss Federal Institute of Technology Zurich, PO Box 474, 8803 Rüschlikon, Switzerland. Author Juillerat is with the Nestlé Research Center, PO Box 44,1000 Lausanne 26, Switzerland and author Barclay is with Nestec Ltd., Av. Nestlé 55, 1800 Vevey, Switzerland. Direct inquiries to author Davidsson (E-mail: lena.davidsson@ilw.agrl.ethz.ch).
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  • The financial support of Nestec Ltd., Vevey, Switzerland is gratefully acknowledged.

Abstract

ABSTRACT: Phytic acid, a potent inhibitor of mineral and trace element absorption, occurs in all cereal grains and legume seeds. The possibility to increase phytase activity and/or reduce the phytic acid content by soaking and germination was investigated in a wide range of grains and seeds, but not found to be effective. Germination, but not soaking, increased phytase activity 3 to 5-fold in some cereal grains and legume seeds, while the influence on phytic acid content was insignificant in most materials tested. High apparent phytase activity was found in untreated whole grain rye, wheat, triticale, buckwheat, and barley. Their usefulness as sources of phytase in complementary food production should be further investigated.

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