Christine Esposito, Managing Editor04.29.21
US Patent 10,966,911 B2 (Daiki Murase, Akira Hachiya, Naoki Oya, Kei Takano Akiko Kawasaki, Keigo Kawabata); Kao Corporation, Tokyo, patented a method for inhibiting melanin decomposition in a subject's keratinocytes. It entails applying to the skin an effective amount of an external preparation that comprises proguanil or a salt thereof.