The danger of high LDL is mainly easy to form atherosclerosis and induce cardiovascular and cerebrovascular diseases. LDL is a kind of lipoprotein particles that carry cholesterol from the liver into the peripheral tissue cells in the human body. Under normal circumstances, serum LDL should be lower than 3.4mmol/L. If LDL is measured higher than normal, it means that there exists high-LDL anemia, which is harmful to the human body to a certain extent. When LDL is high, the cholesterol carried outside the liver is also high, and this cholesterol can be deposited on the walls of the blood vessels, leading to the formation of atherosclerosis and other hazards, atherosclerosis is most often found in the coronary arteries and cerebral arteries, leading to narrowing of the blood vessels in the heart and brain, which can lead to a wide range of cardiovascular and cerebral vascular diseases.