PROBLEM TO BE SOLVED: To provide an anti-oxidizing agent which contains a substance having one or more actions selected from the group consisting of an SOD-like action, a peroxide-eliminating action, and a radical-eliminating action as an active ingredient, to provide an anti-inflammatory agent containing a substance having a hyaluronidase-inhibiting action and/or a hexosaminidase separation-inhibiting action as an active ingredient, to provide a bleaching agent or tyrosinase inhibitor containing a substance having a tyrosinase-inhibiting action as an active ingredient, and to provide an antiaging agent containing a substance having a fibroblast growth-stimulating action and/or an epidermal keratinocyte growth-stimulating action as an active ingredient.SOLUTION: The anti-oxidizing agent, the anti-inflammatory agent, the bleaching agent, the tyrosinase inhibitor, the antiaging agent or the skin cosmetic is characterized by containing piceatannol 4-O-&beta-D-glucopyranoside as an active ingredient.COPYRIGHT: (C)2007,JPO&INPIT【課題】SOD様作用、過酸化水素消去作用及びラジカル消去作用からなる群より選ばれる1種又は2種以上の作用を有する物質を有効成分とする抗酸化剤、ヒアルロニダーゼ阻害作用及び/又はヘキソサミニダーゼ遊離抑制作用を有する物質を有効成分とする抗炎症剤、チロシナーゼ阻害作用を有する物質を有効成分とする美白剤又はチロシナーゼ阻害剤、線維芽細胞増殖促進作用及び/又は表皮角化細胞増殖促進作用を有する物質を有効成分とする抗老化剤を提供することを目的とする。【解決手段】抗酸化剤、抗炎症剤、美白剤、チロシナーゼ阻害剤、抗老化剤又は皮膚化粧料に、ピセアタンノール4’-O-β-D-グルコピラノシド(piceatannol 4-O-β-D-glucopyranoside)を有効成分として含有せしめる。【選択図】なし
