A high LDL level of 3.8mmol/L is not a requirement for taking medication, but it is necessary to take medication if you have risk factors and the effect of simply improving your lifestyle to lower your lipids is unsatisfactory. The normal level of LDL is less than 3.12mmol/L, and for people with risk factors such as coronary heart disease, diabetes, cerebral infarction, hypertension, etc., it is more important to have a level of at least less than 1.8mmol/L. For the general public, the first step is to carry out lifestyle intervention, including dietary avoidance of greasy and stimulating foods, maintaining appropriate aerobic exercise, and quitting smoking and drinking. If the lipid-lowering effect is unsatisfactory after this intervention, or if people have the above risk factors, they often need to take medication for intensive lipid-lowering to slow down or even reverse the disease progression. Commonly used medications include Rosuvastatin, Ezetimibe, and Colesevelam. It is recommended to consult a doctor for standardized diagnosis and treatment when necessary.