Folate is required for production of new cells and for making DNA and RNA (the blueprints for your cells). Folate is also necessary for protein metabolism. A deficiency of folate may result in folate anemia.
1 to 3 years: 150 micrograms per day
4 to 8 years: 200 micrograms per day
9 to 13 years: 300 micrograms per day
14 to 18 years: 400 micrograms per day
19+ years: 400 micrograms per day
Folic acid supplements also may reduce homocysteine levels in your blood, however folic acid supplementation does not appear to reduce the risk of cardiovascular disease.
vitamin B9, pteroylglutamic acid
National Institutes of Health, Office of Dietary Supplements. "Dietary Supplement Fact Sheet: Folate." Updated 08/2005.