PROBLEM TO BE SOLVED: To provide a melanogenesis promoter, a skin browning agent and a white hair preventing/improving agent which are useful for increasing the amount of melanocyte melanin in the skin and hair, and for skin browning and white hair prevention or improvement, and the like.SOLUTION: The invention provides a melanogenesis promoter containing a secretagogue of an exosome derived from keratinocyte as an active ingredient.SELECTED DRAWING: None【課題】皮膚や毛髪のメラノサイトメラニン量を増加し、皮膚の褐色化及び白髪の予防又は改善等に有用なメラニン産生促進剤、皮膚褐色化剤及び白髪予防改善剤の提供。【解決手段】ケラチノサイト由来エクソソームの分泌促進物質を有効成分とするメラニン産生促進剤。【選択図】なし
