Diabetic patients can eat fish oil, especially deep-sea fish oil, because deep-sea fish oil is rich in n-3 polyunsaturated fatty acids, the more important of these fatty acids are EPA and DHA, these unsaturated fatty acids have a variety of physiological roles, can participate in the composition of cell membrane phospholipids, which is conducive to maintaining the fluidity and stability of the cell membrane to ensure the normal physiological function of the cell, but also to promote the esterification of cholesterol thus reducing serum cholesterol levels, and can reduce blood viscosity, which can improve blood circulation and have a certain role in preventing atherosclerosis, thus preventing the occurrence of coronary heart disease. Diabetic patients are prone to atherosclerotic cardiovascular disease, so the unsaturated fatty acids contained in fish oil are beneficial to diabetic patients. In addition, the DHA in fish oil can also improve the activity of brain cells and increase memory, so diabetic patients can appropriately supplement deep-sea fish oil.