It is
the calcium salt of L**-methyltetrahydrofolate, which belongs to
the folic acid group of vitamins (vitamin B9, folic acid), which is
a coenzyme form of folic acid. Calcium l**-methyltetrahydrofolate
(*-mthf) is a naturally occurring salt-forming methyl derivative of
folic acid. *-mthf is also known as L-methylfolate. It is the most
biologically active and functional form of folic acid. form, which
is easier to absorb than regular folic acid.
