PROBLEM TO BE SOLVED: To provide a collagen production promoter having better stability than that of conventional ones.SOLUTION: A collagen production promoter contains Castanea crenata skin extracts as an active ingredient.COPYRIGHT: (C)2014,JPO&INPIT【課題】従来のものに比べて安定性に優れたコラーゲン産生促進剤の提供。【解決手段】栗(Castanea crenata)皮の抽出物を有効成分として含有するコラーゲン産生促進剤。【選択図】なし