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 includes lysophosphatidylinositol or its salt as an active ingredient. A postprandial digestion promoter or stomach dull feeling-improving agent contains lysophosphatidylinositol or its salt as an active ingredient.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】リゾホスファチジルイノシトール又はその塩を有効成分とするGIP上昇抑制剤。【選択図】なし