LDL 5mmol/L is considered high. The normal level of LDL is ≤3.4mmol/L, reaching 3.4-4.1mmol/L is considered borderline, and exceeding 4.1mmol/L is considered elevated. Therefore, 5mmol/L is already a relatively high level. Since LDL levels are closely related to the development of atherosclerotic diseases such as cerebral infarction and coronary heart disease, it is important to intervene as soon as possible. Generally, the first step is to improve lifestyle habits, avoiding oily and high-salt diets, maintaining a certain frequency and intensity of aerobic exercise, and quitting smoking and drinking. At the same time need to carry out drug treatment, such as oral statin such as atorvastatin, ezetimibe and other drugs, need to consult a professional doctor before using drugs, do not unauthorized use of drugs. -Consult your doctor before taking any medication. It is recommended to consult a medical professional for standardized diagnosis and treatment when necessary.