PROBLEM TO BE SOLVED: To provide a composition for inhibiting the intestinal decrease of Lactobacillus lactic acid bacteria counts in a subject to be administered with an antibacterial agent, and an inhibiting method therefor.SOLUTION: A composition according to the present invention is a composition for inhibiting the intestinal decrease of Lactobacillus lactic acid bacteria counts in a subject to be administered with an antibacterial agent. The composition contains a whey fermentation product of propionic acid bacteria.SELECTED DRAWING: None【課題】抗菌薬を投与される対象における腸管内ラクトバチルス属乳酸菌の減少を抑制できる組成物およびその抑制方法の提供。【解決手段】本発明の組成物は、抗菌薬を投与される対象における腸管内ラクトバチルス属乳酸菌減少抑制用組成物であって、プロピオン酸菌による乳清発酵物を含んでなる。【選択図】なし
