i am taking the boots mum-to-be tablets and had problems with going to the loo the first week or so of using them - the problem being i couldnt stop!! it has since calmed down this is now day 15 and i do feel alot better for taking them.
they are also on 3 for 2 offer at the moment and alot less expensive that pregnacare, after comparing the ingredients all but one is missing - but in the mum-to-be's there are higher qtys for some of the RDA vitamins so it equals out. no yellow wee and black poo for me - just alot more of it !! i read that your body will flush out any additional folic acid that it doesn't need. you will also find that in most cereals these days folic acid and vitamins are included - if you have 2 bowls of special k in a day i think its all of your recomended daily allowance!

i wouldnt stop taking folic acid though if you are ttc its better to take it, it can't do your body any harm and will be beneficial to your little bubba in the long run