PROBLEM TO BE SOLVED: To provide agents for improving or preventing pigmentation.SOLUTION: The invention provides an agent for improving or preventing pigmentation that contains humic soil extract as an active ingredient. The agent for improving or preventing pigmentation, suitably, contains 0.1-100 mg/L, preferably 1-50 mg/L, more preferably 5-50 mg/L of fulvic acid when a humic soil extract is dissolved or suspended in water so that solid concentration is 0.5 mass%, the humic soil extract being suitably obtained with a water based solvent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】色素沈着改善又は予防剤の提供。【解決手段】腐植土抽出物を有効成分とする色素沈着改善剤又は予防剤。腐植土抽出物が、水系溶媒で得られるものが好適であり、腐植土抽出物を、固形分濃度が0.5質量%となるように水に溶解又は懸濁したときに、フルボ酸を0.1~100mg/L、好ましくは1~50mg/L、より好ましくは5~50mg/L含有するものが好適である色素沈着予防剤又は改善剤。【選択図】なし
