PROBLEM TO BE SOLVED: To provide a GIP increase inhibitor which can be used for medicines, foods, and the like.SOLUTION: The GIP increase inhibitor contains Quillaja or its extract as an active ingredient. In the GIP increase inhibitor, the Quillaja extract is a water extract or an ethanol aqueous solution extract.COPYRIGHT: (C)2012,JPO&INPIT【課題】医薬品、食品等に利用することのできるGIP上昇抑制剤の提供。【解決手段】キラヤ又はその抽出物を有効成分とするGIP上昇抑制剤。【選択図】なし