PROBLEM TO BE SOLVED: To provide a formulation that promotes production of hyaluronic acid, maintains texture of a skin surface, supports three-dimensional structure of a skin surface to keep firmness or luster of skin, prevents reduction of water-holding capacity of skin associated with aging, and furthermore, is effective for treating rheumatic arthritis, suppurative arthritis or gouty arthritis, initial period of scald.SOLUTION: A hyaluronic acid synthesis promoter has one or more kinds of extract selected from an extract of Malva sylvestris, an extract of leaves of Hydrangea serrata, an extract of Gardenia fruit, and an extract of genus Urtica plant as an active ingredient.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】ヒアルロン酸の産生を促進し、肌表面のキメを整え、肌表面の立体的な構造を支え肌にハリや艶を保ち、老化に伴う皮膚の保水力の減少を防ぎ、さらには関節リウマチ、化膿性関節炎や通風性関節炎、熱傷の初期の治療薬に有効な製剤の提供。【解決手段】ウスベニアオイの抽出物、アマチャの葉の抽出物、クチナシの果実の抽出物、イラクサ属植物の抽出物より選ばれる１種又は２種以上の抽出物を有効成分とするヒアルロン酸合成促進剤。【選択図】図１
