Fish oil as a health food, moderate consumption has the health effect of regulating blood lipids, but excessive consumption of fish oil may affect the liver detoxification function and affect the coagulation function and so on. Fish oil is a kind of oil extracted from fatty fish, containing 14g of EPA (eicosapentaenoic acid) and 10g of DHA (docosahexaenoic acid) per 100g, and moderate consumption of fish oil can regulate blood lipids, which is beneficial to human health. It is important to note that fish oil should not be taken in excess, otherwise it may damage liver cells, affecting the detoxification function of the liver and increasing the chances of liver lesions. Fish oil is rich in high protein, overdose will also increase the burden on the kidneys, affecting the metabolic function of the kidneys. Long-term overdose of fish oil may also affect the body’s blood clotting function, bleeding gums, nosebleeds and other adverse reactions. Moderate consumption of fish oil for human health has certain benefits, but need to be standardized under the guidance of a doctor, can not be overdosed, and can not replace the drug.