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Soy may protect against cancer.

  This new study, conducted at the University of Southern California School of Medicine, found that the soy constituent genistein soy's suppresses the production of harmful stress proteins in cells. These stress proteins, which include heat shock proteins (HSPs) and glucose-regulated proteins (GRPs), normally help cancer cells survive destruction by the immune system. Dr. Amy S. Lee, one of the authors of the study which was published in the Journal of the National Cancer Institute, says that soy products contain high levels of genistein, a phytoestrogen that is a potent inhibitor of cell proliferation, and that genistein has been found to inhibit both growth of carcinogen-induced cancers in rats, and human leukemia cells transplanted into mice. The authors concluded that "the effectiveness of genistein as an anti-cancer agent in humans await further preclinical, clinical and epidemiological testing."  
  PR Newswire, April 24, 1998.  
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