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Original Articles

New Potent Antioxidative o-Dihydroxyisoflavones in Fermented Japanese Soybean Products

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Pages 1637-1639 | Received 23 Mar 1999, Accepted 26 May 1999, Published online: 22 May 2014
 

Abstract

A potent antioxidative 6-hydroxydaidzein (6-OHD) was newly isolated from soybean koji fermented with Aspergillus oryzae. 6-OHD, in addition to 8-hydroxydaidzein and 8-hydroxygenistein, were found to be present in various fermented soybean products, including their koji. Considering that these o-dihydroxyisoflavones had strong antioxidative activities, they may contribute to protecting from oxidative deterioration during the processing of fermented soybean products.

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