LDL 3.89mmol/L is an elevated level and is not normal. The normal reference value for LDL is less than or equal to 3.4mmol/L, and in people with risk factors such as coronary heart disease, hypertension, diabetes, etc., the level is required to be less than 1.8mmol/L. Therefore, 3.89mmol/L is an elevated level and requires intervention. At present, the first step is to improve the lifestyle, including dietary avoidance of oily and high-salt foods, cessation of smoking and alcohol consumption, and maintenance of appropriate frequency and intensity of aerobic exercise. In addition, if necessary, medication is needed, including statins such as atorvastatin, bile acid sequestering agent colesevelam, and cholesterol absorption inhibitor ezetimibe. Consult a medical professional for medication. Do not take them without authorization. If necessary, please consult a doctor for standardized treatment.