High LDL may be due to the patient’s long-term high-fat diet, always eating foods with high cholesterol and high calories, and less exercise, then LDL is likely to be elevated. In addition, some elderly patients may have a light diet and go for walks, laps and exercise regularly, but still have elevated LDL, which is considered to be related to the slow metabolism of the elderly. There are also some diseases that can lead to LDL elevation, such as diabetes, abnormal glucose tolerance, obesity, Cushing’s syndrome, systemic lupus erythematosus, and nephrotic syndrome, which can also cause LDL elevation secondary to these problems.