LDL 1.97mmol/L is not considered high. The normal range of LDL is 1.4~3mmol/L, within this range are considered normal, so LDL 1.97mmol/L is not considered high. LDL is mainly converted by the liver, and LDL can transport a large amount of cholesterol into the blood, making the level of cholesterol in the blood significantly higher. And elevated LDL can easily lead to cardiovascular and cerebrovascular diseases in patients, even life-threatening. Therefore, LDL must be kept within the normal range. If LDL is out of the normal range, it is necessary to improve the relevant examinations, not based on the results of this diagnosis alone, and need to strictly follow the doctor’s instructions for treatment.