21st Century Folic Acid

If u look at the contents, the yellow folic acid that's available in alot pharmacy has way higher content than most of the prenatal multivits out there. N its cheap, per 1 month pack $4+ only. Even cheaper if u were to buy in polyclinic and gov hospital. I have seen so many gynaes over the years, some have differing views as to whether to take prenatal multivits in trimester 1. My current gynae says only start on trimester 2, only gave me the yellow folic acid.