If a patient’s lipid profile is below the lower limit of normal, it is important not to worry, but to first identify the cause of the lower limit. This is because in clinical practice, many elderly people take long-term oral statins, such as simvastatin, resulvastatin, atorvastatin, etc. Long-term use of these drugs will cause the lipids to fall below the lower limit of normal, and this is a beneficial thing because only the lower the LDL cholesterol, the greater the benefit to the relative patient, and the less likely the patient will develop atherosclerotic disease. If a patient is not taking special medications and is found to be below the lower limit of normal when the lipids are checked, it is considered possible that the lipids are below the lower limit of normal due to the presence of liver function abnormalities or the presence of relatively severe malnutrition in the patient.