Total cholesterol is the cholesterol that is contained. Total cholesterol is the sum of cholesterol contained in all lipoproteins in the blood, i.e. the sum of bound and free cholesterol, including free cholesterol and cholesteryl esters, which is the cholesterol contained in various lipoproteins in the serum. Cholesterol is an important raw material for the synthesis of physiologically active substances such as adrenocorticotropic hormones, sex hormones, bile acids and vitamin D. It is also a major component of cell membranes, and its serum concentration can be used as an indicator of lipid metabolism. Total cholesterol is a part of blood lipids. Lipids are the fats in the body’s blood plasma, including triglycerides, LDL cholesterol and HDL cholesterol. High-density cholesterol is generally good cholesterol, which is cardiovascular protective; low-density cholesterol is bad cholesterol, and high levels tend to increase the risk of coronary heart disease. Elevated total cholesterol indicates abnormal blood lipid metabolism, which can cause hyperlipidemia and induce arterial plaque formation. In general, if elevated cholesterol is found, especially elevated LDL cholesterol, it is recommended to actively regulate and treat it to avoid inducing other complications. The diet should be light and avoid the intake of fatty and greasy foods, such as fatty meat, animal offal, butter, etc. Attention should be paid to strengthening physical exercise, such as jogging, going up and down stairs, cycling, swimming, etc. Proper exercise can lower the serum total cholesterol, triglycerides and other lipoprotein values.