PROBLEM TO BE SOLVED: To provide milk or soybean milk-derived material in which gastrointestinal tract and feces-derived Lactobacillus lactobacilli can proliferate, and a lactobacilli fermentation product made using the material.SOLUTION: A milk or soybean milk-derived composition is obtained by having milk or soybean milk material comprising milk or soybean milk-derived protein subjected to protease treatment.COPYRIGHT: (C)2015,JPO&INPIT【課題】消化管内および糞便由来のラクトバチルス属乳酸菌が増殖可能な乳もしくは豆乳由来の材料、この材料を用いた乳酸菌発酵物を提供する【解決手段】乳又は豆乳由来のタンパク質を含有する乳もしくは豆乳素材をプロテアーゼ処理してなる乳もしくは豆乳由来組成物。【選択図】なし