Folic acid supplementation can effectively prevent the occurrence of cardiovascular and cerebrovascular diseases, for example, it can effectively reduce blood lipids and reduce blood viscosity. Can effectively reduce the probability of the occurrence of cardiovascular and cerebrovascular diseases, because folic acid essentially belongs to a kind of B vitamins, belongs to a kind of water-soluble vitamins. During the preparation for pregnancy, and women in the first trimester of pregnancy, timely supplementation of folic acid can effectively prevent the fetus from developing neural tube malformation. In fact, whether it is the prevention of neural tube malformation, or the prevention of cardiovascular and cerebrovascular diseases, its mechanism of action is the same, are able to effectively improve the blood viscosity. Because folic acid can participate in the synthesis of hemoglobin, adrenaline, and can participate in protein synthesis. In the metabolism of various amino acids, will play an important role. So folic acid supplementation can not only prevent fetal neural tube malformation, but also effectively prevent some cardiovascular and cerebrovascular diseases.