The invention is about a method of increasing the solubility of fat-soluble nutrient in water. The method comprises a step (1 1) of increasing the pH of water to generate alkaline water with a pH of at least about 8.0； a step (12) of mixing the water with an edible oil to generate surfactant-containing water； a step (13) of adjusting the pH of the surfactant-containing water to a predetermined range； and a step (14) of combining the surfactant-containing water and substance containing the fat-soluble nutrient to produce food or drink. An apparatus for conducting the method is also provided.
