The concept of deep-sea fish oil is the abbreviation of unsaturated fat in deep-sea fish. Fish oil refers to the oil in fish that is rich in EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). Ordinary fish contain very little EPA and DHA. Only fish in the deep sea in cold regions, such as salmon and sardines, have extremely high levels of EPA and DHA, and other terrestrial animals hardly contain EPA and DHA. Therefore, deep-sea fish are used to refine EPA and DHA.
