PROBLEM TO BE SOLVED: To provide in vivo fatty acid content increasing agents that promote the production of fatty acids in a living body to increase the total fatty acid content in the living body, in vivo highly unsaturated fatty acid content increasing agents that promote the production of in vivo highly unsaturated fatty acid to increase the amount of in vivo highly unsaturated fatty acid, in vivo fatty acid composition modifying agents for modifying an in vivo fatty acid composition which promote the production of in vivo highly unsaturated fatty acids to increase the amount of in vivo highly unsaturated fatty acids, and highly unsaturated fatty acid synthesis gene expression promoters which promote the expression of in vivo highly unsaturated fatty acid synthesis gene to increase the expression amount of the gene.SOLUTION: Provided are an in vivo fatty acid content increasing agent, an in vivo highly unsaturated fatty acid content increasing agent, an in vivo fatty acid composition modifying agent, and a highly unsaturated fatty acid synthetic gene expression promoting agent, which contain at least one extract selected from a group consisting of Pyrus communis L. extract and Prunus domestica extract, as an active ingredient.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】生体内における脂肪酸の生成を促進して生体内の総脂肪酸量を増加させる生体内脂肪酸含量増加剤、生体内における高度不飽和脂肪酸の生成を促進して生体内の高度不飽和脂肪酸量を増加させる生体内高度不飽和脂肪酸含量増加剤、生体内における高度不飽和脂肪酸の生成を促進して生体内の高度不飽和脂肪酸量を増加させ、生体内の脂肪酸組成を改変する生体内脂肪酸組成改変剤、及び生体内における高度不飽和脂肪酸合成遺伝子の発現を促進して当該遺伝子の発現量を増加させる高度不飽和脂肪酸合成遺伝子発現促進剤を提供する。【解決手段】セイヨウナシ(Pyruscommunis L.)抽出物及びプルーン(Prunusdomestica)抽出物からなる群より選ばれる少なくとも1種の抽出物を有効成分とする、生体内脂肪酸含量増加剤、生体内高度不飽和脂肪酸含量増加剤、生体内脂肪酸組成改変剤、又は高度不飽和脂肪酸合成遺伝子発現促進剤。【選択図】なし
