An anti-aging agent for skin or an anti-aging-related gene expression regulating agent that is highly safe and can be used safely over a long period of time, and a cosmetic product comprising the anti-aging agent or an anti-aging-related gene expression regulating agent To provide. An anti-aging agent for skin or an anti-aging gene expression regulating agent, an anti-aging agent or an anti-aging-related agent containing special low molecular weight DNA and soybean extract, preferably soybean bud extract as active ingredients. A cosmetic comprising a gene expression regulating agent. Such anti-aging agents, anti-aging-related gene expression regulating agents or cosmetics have a function activation function of dermal fibroblasts, so that prevention or improvement of skin aging such as skin tension and elasticity, wrinkles and sagging There is expected. [Selection figure] None【課題】 安全性が高く、長期間にわたって安心して使用できる皮膚の抗老化用剤又は抗老化関連遺伝子発現調節用剤、該抗老化用剤又は抗老化関連遺伝子発現調節用剤を含んでなる化粧品を提供すること。【解決手段】 特殊低分子化DNAと大豆抽出物、好ましくは大豆芽エキスとを有効成分として含む皮膚の抗老化用剤又は抗老化関連遺伝子発現調節用剤、該抗老化用剤又は抗老化関連遺伝子発現調節用剤を含んでなる化粧品。かかる抗老化用剤、抗老化関連遺伝子発現調節用剤又は化粧品は、真皮線維芽細胞の機能賦活作用を有するので、肌の張りや弾力の低下、しわやたるみ等の皮膚の老化の予防又は改善が期待される。【選択図】なし