Patent ID: 8877269

Claim:
A method for preparing a probiotics-containing soybean oligosaccharide product comprising the following steps: (a) extracting a soybean raw material with water under an acidic condition of pH 3-6; (b) subjecting the extract mixture from step (a) to solid-liquid separation to obtain a solution of saccharides; (c) adjusting pH of the solution of saccharides to alkaline and then adding a phytic acid precipitating agent thereto to form a precipitation of phytate salts, followed by solid-liquid separation to obtain a solution of crude soybean saccharides; (d) removing proteins from said solution of crude soybean saccharides, and then removing salts therein to obtain a solution of desalinated soybean saccharides; (e) inoculating said solution of desalinated soybean saccharides with probiotics for fermentation, and then collecting fermented liquid therefrom; wherein: said probiotics are able to decompose monosaccharides and disaccharides but not trisaccharides or tetrasaccharides; and said product comprises saccharides of soybean and probiotics, wherein said saccharides of soybean comprise fructose, glucose, sucrose, raffinose, and stachyose with a percentage of a combined weight of raffinose and stachyose being greater than 46%, a weight percentage of fructose being not greater than 8.5%, and a weight percentage of glucose being not greater than 1.0%, based on the total weight of fructose, glucose, sucrose, raffinose, and stachyose.