Serum apolipoprotein B, the normal range for men is 0.43-1.28 g/L and for women is 0.42 to 1.12 g/L. The higher the apolipoprotein b, the greater the probability that the patient will develop coronary atherosclerosis. Apolipoprotein b, which reflects B-type LDL cholesterol, represents increased B-type LDL if it is elevated. Apolipoprotein A1, which reflects the amount of HDL cholesterol in the blood, is generally used to predict coronary heart disease, and is a very valuable diagnostic method. It is a very valuable diagnostic method. At present, there are more tests in the clinic, and the reference significance is relatively large.