Folic acid is a water-soluble B-vitamin (B9) that is the synthetic counterpart of folate, found naturally in foods. It is commonly added to fortified cereals, bread, and supplements to help individuals meet their daily vitamin B9 needs. The body converts folic acid into its active form, tetrahydrofolate, to perform vital functions.
Folic acid is especially important for women of childbearing age, as well as for individuals with increased nutrient needs.