PROBLEM TO BE SOLVED: To provide a new preparation which is effective for inhibiting photoaging, particularly, formation of wrinkles induced by ultraviolet rays, or for inhibiting skin thinning.SOLUTION: The photoaging inhibitor and an inhibitor for skin thinning contain pyrroloquinoline quinone expressed by formula and/or its salt which is pharmacologically allowable.COPYRIGHT: (C)2012,JPO&INPIT【課題】光老化、特に紫外線により誘発されるシワの形成、または皮膚菲薄化抑制に有効な新規製剤の提供。【解決手段】下式に示すピロロキノリンキノンおよび/またはその薬理学的に許容できる塩を含有する光老化抑制剤および皮膚菲薄化抑制剤。【選択図】なし
