PROBLEM TO BE SOLVED: To provide novel hair tonics containing urolithins, and novel 5α-reductase activity inhibitors containing urolithins.SOLUTION: The invention provides hair tonics containing urolithins, and 5α-reductase activity inhibitors containing urolithins.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】ウロリチン類を含有する新規な育毛剤、及び、ウロリチン類を含有する新規な5αレダクターゼ活性阻害剤の提供。【解決手段】ウロリチン類を含有する育毛剤、及び、ウロリチン類を含有する5αレダクターゼ活性阻害剤。【選択図】図1