Susan love research foundation has a good article about the research of soy products and breast cancer. Like anything overdoing is the culprit soy is a natural estrogen. The controversy comes from making soy a main source of your diet. Soy milk soy supplements soy beans tofu. My doctor had told me occasional tofu and occasional soy beans or occasional shoyu is fine. Where as my cousins doctor told her she had to read all ingredients and avoid all soy products. She was going nuts reading ingredients and soy is pretty much in everything she was scared to eat anything. On Susan loves link to the soy study http://www.dslrf.org/breastcancer/content.asp?CATID=0&L2=4&L3=5&L4=0&PID=&sid=130&cid=2129
Hope this helps
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