Fish oil contains a certain amount of unsaturated fatty acids and has a certain effect on lowering blood lipids when eaten in moderation. However, since fish oil is a high-calorie food, if eaten in excess, it will lead to a large amount of calorie intake into the body, resulting in excess nutrients, which will be transformed into fat and stored in the body, resulting in weight gain and elevated blood lipids, thus being detrimental to health. Normal people need to have a reasonable diet at ordinary times. It is recommended to eat less salt and oil, eat more fresh vegetables and fruits, and appropriately supplement some high-quality protein foods, such as fish, milk, eggs and lean meat to ensure the physiological needs of the human body. In addition to a reasonable diet, regular exercise is usually required to maintain a good weight level, not to strain at work, to ensure sufficient sleep at night and to maintain a good psychological state, which is very beneficial to physical health.