Method for modifying kidney beans, kidney bean jiuqu, and oral composition

摘要

PROBLEM TO BE SOLVED: To improve the water solubility of polyphenol contained in green beans, to impart high acidic protease activity to green beans, to provide green beans having high water-soluble polyphenol content and high acidic protease activity. To provide a new material derived from beans and an oral composition containing the new material. SOLUTION: The steamed green beans are inoculated with at least one of white and black aspergillus and fermented to obtain green beans, and the amount of water-soluble free polyphenol per 1 g of dry weight of the green beans is The acid protease activity per 1 g of dry weight of the green beans is 25,000 U or more, which is 3.5 mg or more in terms of gallic acid, and improves the water solubility of the polyphenol contained in the green beans. This is a method for imparting high acidic protease activity to green beans. [Selection diagram] None