PROBLEM TO BE SOLVED: To provide a diarrhea-predominant irritable bowel syndrome inhibitor that improves diarrhea-predominant irritable bowel syndrome in humans, and a food composition.SOLUTION: The present invention provides a diarrhea-predominant irritable bowel syndrome inhibitor, and a food composition for inhibiting diarrhea-predominant irritable bowel syndrome, containing bacterial cells of Lactobacillus brevis KB290 strain (accession number NITE P-1537) and beta-carotene as active ingredients.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】ヒトにおいて下痢型過敏性腸症候群を改善する下痢型過敏性腸症候群抑制剤及び食品組成物を提供する。【解決手段】ラクトバチルス ブレビス ＫＢ２９０株（受託番号 ＮＩＴＥ Ｐ－１５３７）の菌体及びβ－カロテンを有効成分として含有する、下痢型過敏性腸症候群抑制剤、及び下痢型過敏性腸症候群抑制用の食品組成物。【選択図】なし
