The object of the present invention is to prevent exercise-induced gastrointestinal disorders that can exhibit an improvement effect equivalent to or better than that of the prior art against exercise-induced gastrointestinal disorders such as exercise-induced deterioration of the gastrointestinal barrier function. It is to provide an improving agent. The present invention relates to an agent for ameliorating exercise-induced gastrointestinal disorders, containing cystine or a salt thereof as an active ingredient.本発明の目的は、運動誘発性の消化管バリア機能低下をはじめとする運動誘発性の消化管障害に対して、従来技術と同等以上の改善効果を奏し得る、運動誘発性の消化管障害の改善剤を提供することである。 本発明は、シスチン又はその塩を有効成分として含有する、運動誘発性の消化管障害の改善剤に関する。
