PROBLEM TO BE SOLVED: To provide novel means that inhibits DPP-4.SOLUTION: A composition contains a tripeptide composed of Leu-Arg-Ala.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】DPP-4を阻害する新規な手段の提供。【解決手段】Leu-Arg-Alaからなるトリペプチドを含有する組成物。【選択図】なし