[Objective] The research aimed to provide theoretical basis for applying extracts from sweet potato leaves in antiaging cosmetics.[Method] The extraction and storage conditions of active substances for scavenging free radicals in sweet potato leaves were optimized by orthogonal test and the active components for scavenging free radicals in the extracts were discussed by correlation analysis.[Result] Sweet potato leaves contained the active substances that scavenged DPPH free radicals and hydroxyl free radic...