PROBLEM TO BE SOLVED: To provide a naturally occurring substance-derived IV type collagen production promoter, laminin 5 production promoter, anti-aging agent and cosmetic for the skin.SOLUTION: These contain a flavonoid or a flavonoid glucoside expressed by formula (I) as an effective ingredient. In the formula, R1 and R2 are each one of (a)-(c). Rha is a rhamnose residue. Glc is a glucose residue. (a): When R1 is a hydrogen atom, R2 is a hydrogen atom or an Rha. (b): When R1 is an Rha, R2 is a hydrogen atom. (c): When R1 is an Rha4Glc, R2 is an Rha.COPYRIGHT: (C)2007,JPO&INPIT【課題】天然物由来のIV型コラーゲン産生促進剤、ラミニン5産生促進剤、抗老化剤及び皮膚化粧料の提供。【解決手段】下記式(I)で表されるフラボノイド又はフラボノイド配糖体を有効成分として含有する。式中、R1及びR2は、下記(a)~(c)のいずれかである。ただし、Rhaはラムノース残基、Glcはグルコース残基を表す。(a)R1が水素原子のとき、R2は水素原子又はRha(b)R1がRhaのとき、R2は水素原子(c)R1がRha4Glcのとき、R2はRha【選択図】なし
