Low-density cholesterol should be called low-density lipoprotein (LDL), which is rich in cholesterol, generally speaking, this index is the lower the better, and people with poor lifestyle habits tend to have high LDL, but because LDL is synthesized by the liver, so in some liver diseases, there will also be a situation of low LDL. LDL is a kind of lipoprotein particle that carries cholesterol into peripheral tissue cells. High LDL has a lot to do with daily life and dietary habits, such as frequent consumption of foods rich in saturated fat and trans fatty acids, such as pork, whole milk, egg yolks, fried foods, etc. In addition, factors such as little exercise and high mental stress can also lead to high LDL. People who exercise regularly and enjoy eating vegetables and fruits tend to have lower LDL levels, but since LDL is synthesized by the liver, some patients with abnormal liver metabolism and hepatic synthesis disorders will have low LDL levels. If LDL levels are found to be abnormal, please follow the doctor’s instructions to improve the relevant examinations and treatment.