Total cholesterol of 7.70 mmol/L is elevated and more serious. The normal range of serum total cholesterol should be less than 5.20mmol/L. Total cholesterol is the sum of cholesterol loaded by all lipoproteins in the blood, including free cholesterol and total cholesteryl esters, and the liver is the main organ for synthesizing and storing cholesterol. Hypercholesterolemia is one of the major risk factors for coronary heart disease, and the results of a large number of studies at home and abroad show that elevated cholesterol is closely related to atherosclerotic disease. Therefore total cholesterol of 7.70mmol/L may be serious. When cholesterol is elevated, you should go to a regular hospital in time and be treated under the guidance of a doctor.