Because the dr's aren't taught the things that matter they are taught very little if not nothing about parasites, and the workings of your colon etc. ( a dr said my colon was as clean and pink as the inside of my mouth! wish he could have seen my colonics!!!! A main reason so many people are ill is because of dr's prescribing drugs that are unneccessary and that poisen us. I have been VERY ill for nearly two years now and know exactly how why and when i got ill thanks to my own research including information i found on curezone. i have no faith left in dr's whatsoever.