Folic acid is taken for atrophic gastritis to prevent stomach cancer to some extent. Atrophic gastritis may cause nutrient absorption obstacles due to the damaged gastric mucosa, so vitamin B12 and folic acid deficiency may occur, causing megaloblastic anemia. Therefore, with atrophic gastritis if there is a folic acid deficiency, you need to supplement folic acid in time. It is best to take it after meals to avoid irritation of the gastric mucosa. Folic acid is mainly used to prevent fetal congenital neural tube malformation. It is given as a preventive medicine to women during pregnancy and lactation. Used in the treatment of atrophic gastritis. Megaloblastic anemia caused by vitamin B12 deficiency requires folic acid in combination with vitamin B12. When suffering from atrophic gastritis, it indicates that damage to the gastric mucosa already exists. Improper use of medication may lead to further irritation of the gastric mucosa and aggravate the condition. It is recommended to consult a doctor in a timely manner, under the guidance of the doctor to choose a reasonable drug for comprehensive treatment, do not unauthorized use of drugs.