Total serum cholesterol is the sum of cholesterol contained in all lipoproteins in the blood, including free cholesterol and cholesteryl esters, which are synthesized and stored mainly in the liver. Studies have confirmed that cholesterol is an important raw material for the synthesis of adrenocorticotropic hormones, sex hormones, bile acids and vitamin D. It is also a major component of cell membranes and has a very important physiological role. Clinical determination of total serum cholesterol can be used not only to assess lipid metabolism but also to assist in the diagnosis of diseases, such as elevated total cholesterol in biliary obstruction, nephrotic syndrome, diabetes mellitus, etc., and decreased total cholesterol in acute severe hepatitis, cirrhosis of the liver, etc. The normal value of total serum cholesterol is 3-5.69 mmol/L. If the total cholesterol is between 5.2-6.19 mmol/L it is borderline elevated, i.e., a total cholesterol of 6.1 mmol/L is not serious. For patients with total cholesterol of 6.1mmol/L, they must actively improve their lifestyle, for example, they should pay attention to a low salt and low fat diet, eat more low calorie, low carbohydrate and low cholesterol foods, and carry out a high dietary fiber diet in order to better lower their total cholesterol, and if necessary, they also need to take lipid-lowering drugs to lower their total cholesterol. At present, the most widely used lipid-lowering drugs are statins, and the representative drugs are atorvastatin and pravastatin. In addition, for people who cannot take statins, they can also take oral Chinese medicine, such as blood lipid Kang, to lower the total cholesterol level.