PROBLEM TO BE SOLVED: To obtain an antioxidant and a tyrosinase activity inhibitor superior in antioxidant action, safety, and stability, and a skin care preparation and food and drink containing a gold ion and silver ion.SOLUTION: The antioxidant and tyrosinase activity inhibitor each containing the gold ion and silver ion are provided.COPYRIGHT: (C)2012,JPO&INPIT【課題】抗酸化作用、安全性及び安定性に優れた抗酸化剤及びチロシナーゼ活性阻害剤、並びに金イオンと銀イオンとを含有する皮膚外用剤及び飲食品を得る。【解決手段】金イオン及び銀イオンを含有する抗酸化剤及びチロシナーゼ活性阻害剤。【選択図】図3