<；P>；PROBLEM TO BE SOLVED: To provide a functional composition which is useful for improving dysgryphia, insomnia, manic depressive psychosis, and the like, through a circadian rhythm-controlling activity. <；P>；SOLUTION: This functional composition comprises a soybean milk fermentation product obtained by adding a lactobacillus belonging to the genus Leuconostoc to a soybean milk, fermenting the mixed soybean milk and then collecting the fermentation product. The lactobacillus-fermented product of the soybean milk is added to an arbitrary food or drink, and the resultant food or drink can be used as a functional food or drink which has a circadian rhythm-controlling activity and improves dysgryphia, insomnia, manic depressive psychosis, and the like. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
