[PROBLEMS] To provide are: a skin metabolism enhancer having excellent skin metabolism-enhancing activity； and an external composition for the skin, which comprises the skin metabolism enhancer. [MEANS FOR SOLVING PROBLEMS] Disclosed are: a skin metabolism enhancer comprising a processed product of a plant Panax ginseng and a processed product of a plant Rehmannia chinensis； and a skin-whitening or anti-aging external preparation for the skin and a cosmetic each containing the skin metabolism enhancer.
