PROBLEM TO BE SOLVED: To provide a ceramide production promoter promoting the production of ceramide, a cholesterol production promoter promoting the production of cholesterol, an intercellular lipid production promoter promoting the production of intercellular lipid, a skin barrier function improving agent improving a skin barrier function, an epidermal cornification improving agent improving epidermal cornification, a skin moisturizing agent maintaining or improving a skin moisturizing function, a rough and dry skin preventing or improving agent preventing or improving the rough and dry skin, a hair suppleness or sturdiness imparting agent imparting the suppleness or sturdiness of the hair, and a hair texture improving agent improving the texture of the hair.SOLUTION: The invention relates to a ceramide production promoter, a cholesterol production promoter, an intercellular lipid production promoter, a skin barrier function improving agent, an epidermal cornification improving agent, a skin moisturizing agent, a rough and dry skin preventing or improving agent, a hair suppleness or sturdiness imparting agent, and a hair texture improving agent, containing sorbitan sesquioleate as an active ingredient.SELECTED DRAWING: None【課題】セラミドの産生を促進するセラミド産生促進剤、コレステロールの産生を促進するコレステロール産生促進剤、細胞間脂質の産生を促進する細胞間脂質産生促進剤、皮膚バリア機能を改善する皮膚バリア機能改善剤、表皮の角化を改善する表皮角化改善剤、皮膚の保湿機能を維持又は改善する皮膚保湿剤、肌荒れを予防又は改善する肌荒れ予防又は改善剤、毛髪のハリ又はコシを付与する毛髪のハリ又はコシの付与剤、及び毛髪の感触を改善する毛髪の感触改善剤を提供する。【解決手段】セスキオレイン酸ソルビタンを有効成分とする、セラミド産生促進剤、コレステロール産生促進剤、細胞間脂質産生促進剤、皮膚バリア機能改善剤、表皮角化改善剤、皮膚保湿剤、肌荒れ予防又は改善剤、毛髪のハリ又はコシの付与剤、及び毛髪の感触改善剤。【選択図】なし
