The function and efficacy of folic acid can supplement folic acid, prevent anemia, and prevent fetal neural tube defects. It should be used correctly.

1. Supplementing with folic acid: Folic acid is a water-soluble vitamin in the body. If folic acid is lacking, it is likely to cause dry skin. It should be used in a timely manner to supplement folic acid.

2. Preventing anemia: After folate deficiency, it is likely to cause symptoms of anemia in some people. Usually, using folate can prevent anemia and promote red blood cell formation.

3. Prevention of fetal neural tube defects: Taking folic acid tablets during the first three months of pregnancy and early pregnancy can be used to prevent fetal neural tube defects.

In addition, it can also be applied to megaloblastic anemia.