Folic acid is a water-soluble essential B vitamin found in many foods, including leafy green vegetables, citrus fruits, and beans. Research has established that supplementation with folic acid before and during the first two months of pregnancy can prevent neural tube defects in developing fetuses in women. The U.S. Public Health Service has recommended that women of childbearing age take a supplement containing 400 mcg of folic acid every day to reduce the risk of a pregnancy affected by neural tube defects.
As a dietary supplement, adults take 1 tablet daily with meals, or as directed by a healthcare professional.
No adverse effects have been reported.