Folic acid is vitamin B9, a water-soluble vitamin essential to the body. Since the body cannot synthesize folic acid, it needs to be obtained from food or medications. Human survival is closely related to the numerous biochemical reactions in the body that produce the nutrients and energy the body needs, and folic acid is an important coenzyme involved in purines and thymine, which are substances used in the synthesis of DNA, RNA and proteins. Therefore, fetal growth deficient in folic acid is associated with neural tube abnormalities, congenital heart disease and other problems. The most common disease suffered by adults deficient in folic acid is megaloblastic anemia. In addition, if you want to get pregnant, it is recommended to take folic acid tablets from the first trimester to ensure that your body’s folic acid level meets the needs of pregnancy. Therefore, you should consume more folic acid-rich foods in your daily life, such as green leafy vegetables, eggs, and animal offal. If necessary, you can take folic acid tablets as prescribed by your doctor.