PROBLEM TO BE SOLVED: To provide a new and useful kinesin inhibitor and to provide a composition which is useful for easing, preventing or improving various pigmentation symptoms such as a skin blemish and a freckle.SOLUTION: The kinesin inhibitor includes, as an active ingredient, a specific plant extract (mallow extract or peppermint extract). A pigmentation inhibitor is based on kinesin-inhibiting action. In addition, various compositions (medicinal drug compositions, food compositions and cosmetic compositions) contain the kinesin inhibitor.COPYRIGHT: (C)2013,JPO&INPIT【課題】新規で有用なキネシン抑制剤及び、シミやソバカスをはじめとする様々な色素沈着症状の緩和、予防・改善に有用な組成物を提供する。【解決手段】特定の植物抽出物(ゼニアオイ抽出物、ペパーミント抽出物)を有効成分とするキネシン抑制剤、及びキネシン抑制作用に基づく色素沈着抑制剤。更に、キネシン抑制剤を含有する各種組成物(医薬組成物、食品組成物、化粧料組成物)。【選択図】なし
