Folic acid supplementation can effectively prevent the occurrence of cardiovascular diseases, for example, it can effectively lower blood lipids, blood pressure and reduce blood viscosity. It can effectively reduce the probability of cardiovascular diseases because folic acid is essentially a B vitamin, which is a water-soluble vitamin. Timely supplementation of folic acid during pregnancy preparation and the first trimester of pregnancy can effectively prevent neural tube abnormalities in the fetus. This is because folic acid is involved in the synthesis of hemoglobin, epinephrine, and can participate in protein synthesis. It plays an important role in the metabolism of various amino acids. Therefore, folic acid supplementation can not only prevent fetal neural tube abnormality, but also effectively prevent some cardiovascular and cerebrovascular diseases.