Cholesterol is a very important cause of cardiovascular disease, and if high cholesterol is left unchecked for a long time, the probability of developing cardiovascular disease will increase greatly. Cholesterol mainly comes from the body’s own synthesis and also from food supplementation. Therefore, there are two reasons for high cholesterol: 1) impaired synthesis by oneself; 2) excessive intake of cholesterol from outside. High cholesterol can be caused by improper diet and eating foods containing high cholesterol, such as heart, liver and other animal offal. It may also be due to impaired bile excretion, which leads to increased cholesterol.