A silica formulation comprising cashew nut shell liquid, anacardic acid, cardol, or cardanol, and silica particles, wherein the silica particles have adsorbed therein the cashew nut shell liquid, the anacardic acid, the cardol, or the cardanol, and wherein the silica particles have an average particle diameter of 150 μm or more.一種含有腰果殼油、檟如子酸、腰果二酚或腰果酚、以及二氧化矽粒子的二氧化矽製劑,其特徵係:其二氧化矽粒子吸附腰果殼油、檟如子酸、腰果二酚或腰果酚,二氧化矽粒子的平均粒徑為150μm以上。