Folic acid moderate risk no matter

Folic acid, also known as vitamin B9, is an exogenous substance that cannot be synthesized by the human body. Appropriate folic acid can prevent fetal neural tube defects. However, it should be noted that folic acid supplementation varies according to people at different risks. Excessive folic acid may increase the risk of certain tumors, such as leukemia and breast cancer. For women with a history of birth or family history of neural tube defects, folic acid supplementation should be started at least one month before pregnancy.