Is folic acid or folate supplement pills better for pre-pregnancy preparation?

Folate (folic acid) because...: Folic acid is a synthetic chemical. It is better absorbed than folate (folic acid) in foods but our bodies need to convert it to l-5-methyltetrahydrofolate (folic acid) (l-5-mthf), the active form. About 30% of people have genetic problems converting Folic Acid to l-5-mthf so unless you know you don't have that problem (which can be discovered with a blood test) it is safest to take the l-5-mthf form.