Folic acid treats various causes of folic acid deficiency and is used as a prophylactic drug for the prevention of congenital neural tube malformations in the fetus and in women during lactation and pregnancy. Folic acid is one of the B vitamins and has a yellow or orange appearance and is not heat resistant. Folic acid treats various causes of folic acid deficiency and diseases caused by folic acid deficiency (megaloblastic anemia). Folic acid is also used for prophylactic administration in pregnant and lactating women and for the treatment of folic acid deficiency due to chronic hemolytic anemia. An overdose of folic acid can cause yellowing of the urine, and long-term use can cause digestive symptoms such as nausea and fear of food. Folic acid needs to be taken under the supervision of a professional physician or pharmacist.