High Quality Content by WIKIPEDIA articles! Folic acid (also known as vitamin B9 or folacin) and folate (the naturally occurring form), as well as pteroyl-L-glutamic acid and pteroyl-L-glutamate, are forms of the water-soluble vitamin B9. Folic acid is itself not biologically active, but its biological importance is due to tetrahydrofolate and other derivatives after its conversion to dihydrofolic acid in the liver. Vitamin B9 (folic acid and folate inclusive) is essential to numerous bodily functions ranging from nucleotide biosynthesis to the remethylation of homocysteine. The human body needs folate to synthesize DNA, repair DNA, and methylate DNA as well as to act as a cofactor in biological reactions involving folate. It is especially important during periods of rapid cell division and growth. Children and adults both require folic acid in order to produce healthy red blood cells and prevent anemia. Folate and folic acid derive their names from the Latin word folium (which means "leaf"). Leafy vegetables are a principal source, although, in Western diets, fortified cereals and bread may be a larger dietary source.

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