PROBLEM TO BE SOLVED: To provide a food or a drug for regulating the composition ratio of intestinal bacterial flora, safe with little side effect.SOLUTION: An agent for regulating the composition ratio of intestinal bacterial flora containing at least one sugar absorption inhibitor, and the food or the drug containing the same are provided.COPYRIGHT: (C)2015,JPO&INPIT【課題】安全で副作用の少ない腸内細菌叢構成比率を調整しうる食品又は医薬品を提供。【解決手段】糖吸収抑制物質の少なくとも1種を含有することを特徴とする腸内細菌叢構成比率調整剤、これを含む食品又は医薬品。【選択図】なし