Iron deficiency can cause anemia, as can vitamin B12 or folic acid deficiency.
folic acid fo·lic acid (fō'lĭk, fŏl'ĭk)
A yellowish-orange compound of the vitamin B complex group, occurring in green plants, fresh fruit, liver, and yeast. Also called folacin, folate, vitamin Bc.
A water-soluble vitamin belonging to the vitamin B complex that is necessary for the formation of red blood cells and important in embryonic development. It is also the parent compound of coenzymes in various metabolic reactions. Folic acid is found especially in green leafy vegetables, liver, and fresh fruit. Deficiency of folic acid in the diet results in anemia. Chemical formula: C19H19N7O6.