LDL cholesterol 3.41mmol/L is a borderline level, which is normal but high. For normal people, the appropriate level of LDL is ≦3.4mmol/L, the borderline level is 3.4～4.1mmol/L, and elevated >4.1mmol/L. According to this standard, when LDL cholesterol is 3.41mmol/L, it is slightly higher than the appropriate level, so it is recommended to reduce the intake of lipids, and to increase the amount of exercise appropriately. LDL in the blood, one of the risk factors for atherosclerosis, causes elevated LDL levels related to long-term high-calorie, high-fat diets, little exercise, and long-term alcohol consumption; it is also related to obesity, nephrotic syndrome, hypothyroidism, and other diseases. When the LDL level is higher than the appropriate level, you should pay attention to your own situation and make timely adjustments.