5-MTHF 1 mgMany individuals dont get sufficient 5 MTHF (L 5 Methyltetrahydrofolate), the active form of folic acid, because they have intestinal or liver dysfunction, or because they are among the three out of five Americans whose genetic makeup makes it difficult to convert folic acid into active 5 MTHF.* A deficiency of folic acid has been linked to low birth weight infants and neural tube defects, which is why the Centers for Disease Control recommends folic