A purpose of a platelet derived growth factor using for turning white hair black is disclosed, which is to introduce a platelet derived growth factor solution into a scalp to increase the content of melanin in the hair. By introducing the platelet derived growth factor to the hair, the degree of melanin concentration in the hair can be significantly improved so as to turn white hair black.本發明係提供一種血小板衍生生長因子用於頭髮白變黑之用途,其係將血小板衍生生長因子溶液導入頭皮中,以增加頭髮中黑色素之含量。藉由血小板衍生生長因子的導入,可顯著地增加頭髮中黑色素的濃度,使白髮轉變為黑髮。