The functions of folic acid include preventing neural tube defects in newborns and preventing anemia in pregnant women. 1. Prevent neural tube defects in newborns: increasing the intake of folic acid is very important for pregnant women, pregnant women need to supplement folic acid during the preparation for pregnancy, can better prevent neural tube defects in the fetus. 2. Prevention of anemia in pregnant women: folic acid can prevent megaloblastic anemia in pregnant women. In addition, folic acid is also used in the prevention and treatment of malnutrition or drug-induced folic acid deficiency; used in aplastic anemia, leukopenia and pernicious anemia adjuvant therapy. Certain patients may experience gastrointestinal symptoms such as lack of appetite, nausea and bloating after taking this product for a long period of time, and it is recommended that supplementation should be carried out under the guidance of a doctor, avoiding self-administration.