Taking folic acid early in pregnancy is safe, even at high doses, and associated with improved neuropsychological outcomes in the offspring at age 6 years.

folic acid up to 0.4 milligrams (mg) per day; more than 0.4 to 1.0 mg per day; more than 1.0 to 4.0 mg per day; and more than 4.0 mg per day. The current recommended dose during pregnancy for the ...