The anti-atherosclerotic factor is HDL. The role of HDL in the body is to transport cholesterol from the surrounding tissues, which is then converted to bile acids or excreted directly from the biliary tract through the bile. Experiments and arterial imaging can prove that HDL cholesterol content, and the degree of arterial lumen stenosis is negatively correlated, that is to say, the higher the HDL, lumen stenosis is less, so HDL is a kind of anti-atherosclerosis plasma lipoproteins, but also coronary heart disease protection factor, commonly known as the “vascular scavenger”. It is also a protective factor against coronary heart disease, commonly known as “vascular scavenger”. HDL is also a protective factor against coronary heart disease, commonly known as “vascular scavenger”. Because of the above advantages, HDL is known as the “good” lipoprotein.