<；P>；PROBLEM TO BE SOLVED: To provide a novel emulsifier derived from food yeast, having high safety, and independently exhibiting high emulsifiability and emulsion stability； a water-soluble composition using the emulsifier and containing a fat-soluble substance； and its production method. <；P>；SOLUTION: The emulsifier comprises a composite having sugar and protein in a culture solution derived by culturing the food yeast as an active ingredient. Further, the water-soluble composition comprises the emulsifier and the fat-soluble substance. Furthermore, the production method comprises the production of the emulsifier and the fat-soluble substance. <；P>；COPYRIGHT: (C)2007,JPO&INPIT
