The types of fish oil mainly include fish body oil, cod liver oil, etc. It contains unsaturated fatty acids, and the substance can play a role in lowering blood lipids to a certain extent, but it is far from a therapeutic effect. Fish oil is rich in W-3 fatty acids. Physiologically, fats and lipids in the blood must bind to specific lipoproteins in order to participate in the circulation. Lipoproteins are categorized as high-density lipoproteins and low-density lipoproteins. Of these, HDL transports lipids to the liver for catabolic reactions, and conversely, LDL transports lipids to tissues throughout the body for storage. Although fish oil is effective in lowering blood lipids, the treatment of hyperlipidemia should still be based on medication, and fish oil can only play an auxiliary role in the treatment. When patients have hyperlipidemia, they need to go to the hospital in time to avoid delaying their condition.