800mcg with Vitamin B-12 Folic acid is a B vitamin that helps cells to replicate normally. That is why it is so vitally important that pregnant women have adequate supplies of folic acid. Good intake of folic acid during pregnancy plays an important role in the prevention of birth defects. When our cells are replicating normally, we lessen the risk of developing conditions of abnormal cell growth. Folic acid was named such because it is found in dark green leafy vegetables. Since many Americans dont eat enough dark green leafy vegetables on a regular basis, supplementing with folic acid is recommended. Many drugs may also deplete your body of folic acid, including antacids, estrogen, oral contraceptives, cholestyramine, colestepol, zantac, triamterene, phenytoin, macrodantin, prednisone, and alcohol. If you are taking any of these medications, supplementing with folic acid is even more important. 200 Tablets.