PROBLEM TO BE SOLVED: To provide a method for evaluating a state of skin aging and/or chappy skin, and evaluating novel usefulness of a component blended into an external preparation for skin such as cosmetics on the basis of the evaluation result.SOLUTION: There are provided an evaluation method for evaluating skin aging-prevention and improvement effect and/or chappy skin prevention and improvement effect of a test substance by using vitamin D as an indicator, an evaluation method for evaluating skin aging and/or chappy skin by using the concentration of vitamin D in blood as an indicator, and an external preparation for skin such as a cosmetic in which active ingredient screened by the evaluation method is blended.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】皮膚の老化及び/又は肌荒れの状態を評価し、当該評価結果に基づいて化粧料等の皮膚外用剤に配合する成分の新規有用性を評価する方法。【解決手段】ビタミンDを指標として、被験物質の皮膚の老化防止・改善効果及び/又は肌荒れ防止・改善効果を評価する評価方法、血中のビタミンDの濃度を指標として、皮膚の老化及び/又は肌荒れを評価する評価方法、及び当該評価方法によりスクリーニングされた有効成分を配合してなる化粧料等の皮膚外用剤。【選択図】図1
