Can folic acid and vitamin C be taken simultaneously?
Women planning pregnancy are generally familiar with folic acid. Indeed, folic acid supplementation is recommended both before conception and during early pregnancy. However, a common question arises: Can folic acid be taken together with vitamin C?

Can folic acid and vitamin C be taken simultaneously?
Yes, folic acid and vitamin C can be taken concurrently, as no adverse drug interactions have been reported between the two.
Clinically, folic acid has two primary indications: First, supplementation during the three months prior to conception and the first three months of pregnancy effectively prevents fetal neural tube defects (NTDs). Second, it is used in the treatment of hyperhomocysteinemia, significantly lowering homocysteine levels and thereby improving clinical outcomes.
Although both agents exhibit excellent safety profiles, they should always be used under medical supervision to ensure appropriate selection and dosing—avoiding potential therapeutic inefficacy or unintended adverse effects on health.
Reducing the risk of birth defects: Over a 13-year collaborative project—the “China-U.S. Neural Tube Defect Prevention Project”—250,000 evidence-based cases demonstrated that daily supplementation with 0.4 mg folic acid, beginning at the preconception stage, reduces the incidence of neural tube defects by 85%, orofacial clefts (cleft lip/palate) by 50%, congenital heart defects by 35%, major external structural malformations in newborns by 15%, and neonatal mortality by 20%.
During the second and third trimesters, increased demands for folic acid arise due to rapid fetal growth and development, as well as maternal physiological changes—including expansion of blood volume and development of the breasts and placenta. Folic acid deficiency during this period may predispose pregnant women to placental abruption, pregnancy-induced hypertension, and megaloblastic anemia. In the fetus, it may lead to intrauterine growth restriction, preterm birth, low birth weight, and—postnatally—impaired physical growth and cognitive development.
We hope the above information is helpful. Wishing you a happy and healthy life!