Milky lactation supplement

Hello.. I'm a ftm my son is 3 months old and I have been Brest feeding I am currently back to work and haveing to give my son formula during my working hours he is eating up to 6 ounces I'm only producing 4 ounces but to day I ran across this milky lactation supplement and I was wondering if any has tryed it?? Did it help you ? I just wana be able to pump enough to feed him while I work.