Soy contains very weak estrogens and has therefore been discussed a great deal in regards to breast cancer. The results of early Chinese studies were not relevant to American women in the same way, as American women, at least at that time, were generally not raised eating an abundance of soy products. A new study looking at these issue was published online May 30 in the American Journal of Clinical Nutrition. The researchers found by pooling both American and Chinese data that soy seems to have a protective role as far as breast cancer is concerned. And it seems the more the better, and especially so for women with estrogen receptor negative cancers. Women with estrogen receptor positive cancers also had a decreased risk of recurrence with increased soy intake if they were also on Tamoxifen. It would be interesting to know if these results would be changed in any way looking at organic versus non-organic soy.
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