The effects of taking folic acid tablets include: folic acid deficiency due to various causes and megaloblastic anemia due to folic acid deficiency. Prophylactic administration in pregnant and lactating women. Folic acid deficiency due to chronic hemolytic anemia. Folic acid is an essential nutrient for cell division and tissue formation, which is involved in the synthesis of genetic material and has a very important role in the growth and development of the fetus, so folic acid is an indispensable nutrient for women who are preparing for pregnancy and pregnancy, and women who are preparing for pregnancy and lack of folic acid will affect the growth and development of the baby and may even lead to preterm delivery. In addition, folic acid tablets are also used to treat folic acid deficiency due to various reasons, megaloblastic anemia due to folic acid deficiency. It is recommended to take folic acid strictly according to the dosage under the guidance of a doctor. If you are taking other vitamins, health food or other medicines containing folic acid at the same time, please be sure to inform your doctor truthfully, and the doctor will adjust the dosage according to the situation. Adverse reactions are rare, and allergic reactions are rare. Gastrointestinal symptoms such as fear of food, nausea and bloating can occur with long-term use. When large amounts of folic acid are taken, it can make the urine yellow. Megaloblastic anemia caused by vitamin B12 deficiency cannot be treated with folic acid alone.