PROBLEM TO BE SOLVED: To provide a fermented food and a sample containing good nutritional components by effectively utilizing soybean milk after collection of Yuba (dried bean curd).SOLUTION: The soybean milk medium after the collection of the Yuba is used for culturing microorganisms, especially lactic acid bacteria. The method for culturing the microorganisms uses the medium. The bean curd lees fermented with the lactic acid bacteria is obtained by mixing the soybean milk, the bean curd lees and the lactic acid bacteria, and highly contains soybean isoflavone. The method for producing the bean curd lees fermented with the lactic acid bacteria is also provided. The food and the sample contain the bean curd lees fermented with the lactic acid bacteria.【課題】湯葉採取後の豆乳の有効利用をはかり、良好な栄養成分を含む発酵食品、試料を提供する。【解決手段】微生物特に乳酸菌を培養するための、湯葉採取後の豆乳培地と、該培地を用いる微生物の培養方法。また豆乳、おから、乳酸菌を混合し、大豆イソフラボンを高含有する、乳酸菌発酵おからとその製造方法。さらに、乳酸菌発酵おからを含む食品と試料。【選択図】なし
