EQUOL-CONTAINING EXTRACT, METHOD FOR PRODUCTION THEREOF, METHOD FOR EXTRACTION OF EQUOL, AND EQUOL-CONTAINING FOOD

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently purifying an equol-containing fermented soybean hypocotyl to obtain a highly pure equol, and an extract obtained by extracting useful components containing equol, and a method for producing the same.SOLUTION: The present invention makes it possible to efficiently obtain useful components containing equol from a fermented soybean hypocotyl by subjecting an equol-containing fermented soybean hypocotyl to extraction using an ethanol aqueous solution as an extractant. The present invention reduces the content of saponin, which causes an unpleasant taste, by sequentially subjecting the equol-containing fermented soybean hypocotyl to extraction using an ethanol aqueous solution and ethanol, while efficiently extracting equol and glycitein. Purified equol is extracted from an equol-containing material by silica gel column chromatography.