Folic acid fragmentation of cell growth and nucleic acids, amino acids, protein synthesis plays an important role. Human body lack of folic acid can lead to abnormal red blood cells, the increase of immature cells, anemia and leukopenia. Folic acid is the indispensable nutritional element for fetal growth and development. Pregnant women lack of folic acid may cause there was a low birth weight, cleft lip and palate, heart defects, etc.