PROBLEM TO BE SOLVED: To provide a hexosaminidase release inhibitor, a stem cell growth factor mRNA expression elevation inhibitor, a prophylactic and ameliorating agent of hydrogen peroxide cytopathy, glutathione production promotor, elastase activity inhibitor, IV type collagen production promotor, hyaluronic acid production promotor, profilagrin production promotor, filagrin production promotor or involucrin production promotor, each from among highly safe natural products.SOLUTION: This hexosaminidase release inhibitor, stem cell growth factor mRNA expression elevation inhibitor, prophylactic and ameliorating agent of hydrogen peroxide cytopathy, glutathione production promotor, elastase activity inhibitor, IV type collagen production promotor, hyaluronic acid production promotor, profilagrin production promotor, filagrin production promotor or involucrin production promotor is incorporated with an extract from Piper longum as an effective component.