Health nuts are killing themselves by gorging on soy products and don't even know it. The soybean itself is fairly harmless, but the derivative products are so high in chemicals and hormones (Phytoestrogens for one) that they are being cited for a growing number of ailments (hormone imbalances, child development, cancer, thyroid, etc). Even 20/20 has done a story on the dangers of soy.
http://www.abcnews.go.com/onair/2020...y_feature.html
http://thyroid.about.com/cs/soyinfo/a/soy.htm
http://creativehealth.netfirms.com/soyindex.shtml
http://www.nexusmagazine.com/soydangers.html