The purpose of the present invention is to provide an ameliorating agent for exercise-induced gastrointestinal disorders, which can exert an ameliorating effect at a level that is the same as or higher than those achieved by the conventional techniques on exercise-induced gastrointestinal disorders including exercise-induced deterioration in intestinal barrier functions. The present invention relates to an ameliorating agent for exercise-induced gastrointestinal disorders, which contains cystine or a salt thereof as an active ingredient.本發明之目的為提供對於以運動誘發性的消化管障壁機能降低為代表之運動誘發性的消化管障礙可顯現出與習知技術同等以上的改善效果之運動誘發性的消化管障礙之改善劑。本發明係關於含有胱胺酸或其鹽作為有效成分之運動誘發性的消化管障礙之改善劑。
