< Topic >The protein of the American rice bran extracting the American rice bran extract which is included, it separates this invention, is superior in the improvement of lipid metabolic error, it is brought by lipid metabolic error, to possess the preventive or improvement effect the high fat blood symptom, obesity or vis-a-vis II type diabetes, at the same time being economic, furthermore obtain the safe composition even in the allergy characteristic aspect.SolutionsThe lipid metabolic error improvement composition which features that the American rice bran protein is contained.【課題】本発明は米糠のタンパク質含む米糠抽出物を抽出して分離し、脂質代謝異常の改善に優れ、脂質代謝異常によりもたらされる、高脂血症、肥満又はII型糖尿病に対して予防又は改善効果を有し、かつ経済的でしかもアレルギー性の面でも安全な組成物を得ること。【解決手段】米糠タンパク質を含有することを特徴とする脂質代謝異常改善組成物。