To provide an aqueous human pest repellent containing a pest repellent ingredient which suppresses permeation of a pest repellent ingredient into the skin and improves sustainability of a pest repellent effect without increasing the blending amount of pest repellent ingredients unfailingly An agent for inhibiting permeation of a pest repellent ingredient into the skin and a method for inhibiting permeation of a pest repellent ingredient into the skin which can be made to be provided.The pest repellent ingredient, which is blended in a pest repellent for human body containing a pest repellent ingredient and is a natural mineral water having an electric conductivity of 1.5 mS / m to 30 mS / m, is applied to the skin of the pest repellent ingredient Penetration inhibitor. Water containing demineralized deep sea water is preferable as the natural mineral water, and 1-methylpropyl 2-(2-hydroxyethyl)-1-piperidinecarboxylate is preferable as the pest repellent ingredient.Selection drawing None【課題】害虫忌避成分を含有する水性の人体用害虫忌避剤において、害虫忌避成分の皮膚への浸透を抑制し、害虫忌避成分の配合量を無闇に増やすことなく害虫忌避効果の持続性を向上させ得る、害虫忌避成分の皮膚への浸透抑制剤、及び害虫忌避成分の皮膚への浸透抑制方法の提供。【課題の解決手段】害虫忌避成分を含有する人体用害虫忌避剤に配合され、かつ、電気伝導率が1.5mS/m~30mS/mの天然ミネラル水である、前記害虫忌避成分の皮膚への浸透抑制剤。前記天然ミネラル水としては、脱塩された海洋深層水を含む水が好ましく、また、前記害虫忌避成分としては、2-(2-ヒドロキシエチル)-1-ピペリジンカルボン酸1-メチルプロピルが好ましい。【選択図】なし
