The present invention improves the solubility of sesamin-class compounds in fish oil and/or wheat germ oil. More specifically, γ-orizanol is combined with fish oil and/or wheat germ oil as well as sesamin-class compounds.本發明可提高芝麻素類對魚油及/或小麥胚芽油之溶解性。具體而言,係於魚油及/或小麥胚芽油與芝麻素類中組合γ-穀維素(γ-oryzanol)。