A method for preparing blended oil containing fat-soluble functional ingredient comprises the steps: a) mixing a granular plant feedstock (e.g., algae feedstock) with an edible oil to obtain a first mixture b) ultrasonic vibrating the first mixture in an ultrasonic device at 0-25 DEG C and under inert gas atmosphere to extract the fat-soluble functional ingredient contained in the plant feedstock into the edible oil to obtain a second mixture and c) solid-liquid separating the second mixture to obtain the edible blended oil containing the fat-soluble functional ingredient, wherein the fat-soluble functional ingredient is an unsaturated fatty acid, such as docosahexaenoic acid (DHA).一種製備含脂溶性機能性成分之調和油的方法,包括:a)將顆粒狀植物性原料(例如藻類原料)與一食用油混合而獲得一第一混合物;b)於一超音波裝置、0-25℃的溫度及惰性氣體氣氛下超音波振盪該第一混合物,使得該植物性原料所含的脂溶性機能性成分被萃取至該食用油中,而獲得一第二混合物;及c)固液分離該第二混合物,而獲得含該脂溶性機能性成分之食用調和油,其中該脂溶性機能性成分為不飽和脂肪酸,例如二十二碳六烯酸(DHA)。
