Dear reallyconcerned, There is not a specific diet or definite do's and don'ts. In general, there is evidence that
obesityObesity and health
Overweight with increased caloric intake of fat, increases risk for breast cancer, so there is
supportSupport
Support 500 to the suggestion of changing a diet to one that is low-fat. There is some concern with components of soy that may act in an
estrogenHormone replacement therapy-like fashion (research continues) so caution is recommended particularly in regard to soy supplements. Dietary soy in moderation is OK. Avoidance of hormone containing foods, you need to read labels.
There are other chemicals in food that researchers are concerned about, such as pesticide residues, though I think they are more worried about these estrogenic chemicals causing an increase in the number of people getting cancers.