The present invention provides a pharmaceutical composition or a cosmetic product which can accelerate production of ceramide in cells. The ceramide production-accelerating agent contains a plant selected from the group consisting of Radix Heraclei Scabridi, Rhizoma Dioscoreae, Radix Rehmanniae, Rhizoma Atractylodis Macrocephalae, Radix Glycyrrhizae, Radix Et Rhizoma Rhei, Pseudobulbus Bletillae, Radix Polygoni Multiflori, Radix Platycodi, and Herba Leonuli, or an extract thereof as an active ingredient. Further, the present invention provides a moisturizing agent containing a plant selected from the group consisting of Herba Leonuri and Rhizoma Dioscoreae, or an extract thereof as an active ingredient.細胞内セラミドの産生を促進するための医薬品、化粧品等の提供。ビャクシ、ジオウ、ビャクジュツ、カンゾウ、ダイオウ、ビャクギュウ、カシュウ、キキョウ、ヤクモソウ及びサンヤクから選ばれる植物又はその抽出物を有効成分とするセラミド産生促進剤。ヤクモソウ及びサンヤクから選ばれる植物又はその抽出物を有効成分とする保湿剤。
