Low ApoA1 1.13g/L means lower than the reference value of ApoA1, which may be related to certain family diseases, acute myocardial infarction and other diseases. ApoA is the main structural protein of HDL, of which ApoA1 accounts for the largest proportion, and plays the function of removing tissue lipids and anti-atherosclerosis. The normal reference value for men is (1.42±0.17)g/L, and the normal reference value for women is (1.45±0.14)g/L, so the ApoA1 of 1.13g/L is low. Low ApoA1 is usually seen in familial diseases such as familial ApoA1 deficiency and familial low HDL anemia; acute myocardial infarction, diabetes mellitus and other diseases can also cause low ApoA1. When ApoA1 is low, the cause of the disease should be clarified under the guidance of a doctor, and active treatment should be carried out.