PROBLEM TO BE SOLVED: To provide an obesity-preventing and improving agent and a material for foods, medicines, etc., capable of exhibiting effects of preventing and improving onset of various life-style related diseases, e.g. prophylaxis and improvement of hyperlipemia, having high safety and broad application range and scarcely impairing texture.SOLUTION: The obesity-preventing and improving agent comprises a hydroxypropylated starch as an active ingredient. An agent for inhibiting accumulation of visceral fat comprises the hydroxypropylated starch as an active ingredient.COPYRIGHT: (C)2004,JPO&NCIPI【課題】肥満予防・改善剤、高脂血症の予防・改善等、種々の生活習慣病の発症を予防・改善する効果を発揮し得る、安全性が高いと共に適用範囲が広く、且つ食感を損なうことが少ない食品、医薬品等の素材を提供する。【解決手段】ヒドロキシプロピル化された澱粉を有効成分とする肥満予防・改善剤。【選択図】 なし