The normal level of LDL cholesterol is below 3.4 mmol/L (130 mg/dl). High LDL refers to higher than normal LDL on laboratory tests, and if this condition is found, if it is to be treated. Reducing LDL consists of two main modalities: lifestyle interventions and medication. 1.Lifestyle intervention Healthy diet: limit the intake of food rich in saturated fatty acids and trans fatty acids (such as butter, cream, lard, etc.), try to use unsaturated fatty acids instead (such as deep-sea fish, fish oil, vegetable oil). Weight management: Weight loss in obese patients can help reduce LDL levels. Physical activity: Ensure at least 30 minutes of moderate intensity exercise at least 5 days per week. Smoking cessation: should completely quit smoking or minimize secondhand smoke inhalation. 2. Medication If patients receive effective lifestyle interventions and still cannot maintain cholesterol levels at normal levels, medication should be considered. There are many types of lipid-lowering drugs available, of which statins are the cornerstone of treatment. For patients who are statin intolerant or whose cholesterol levels do not meet the standard, drug combination therapy should be considered. It should be noted that medications must be taken or adjusted under medical supervision and that adverse reactions during treatment should be closely monitored.