Re: Prisoners fed high soy diet ; develop serious health problems

 It is also possible that, despite the consumption of iodine in sufficient quantity, may have thyroid disorders, because eating excessive quantities Goitrogens
http://www.ncbi.nlm.nih.gov/pubmed/6187759

There is a big difference between goitrogens contaminating a water supply and goitrogens in food.  Xenoestrogens, that frequently contaminate water sources are goitrogenic.  But xenoestrogens average 30,000 to 100,000 times stronger than the estrogens produced by the body. And the estrogens produced by the body average 200 to 400 times stronger than the phytoestrogens found in plants. And these levels drop even further with fermentation or cooking of the plant materials. So the comparison of goitrogens in the water and in plants is like comparing the effects of the ingestion of cyanide found in one apple seed to the effects of ingestion of a large glass of pure cyanide.