Should I avoid soy?

Soy contains phytoestrogens-compounds found in whole grains, nuts, and seeds, and many other botanicals, fruits, and vegetables, which have a mild estrogenic effect. These foods are often associated with a reduced risk of breast cancer, as well as reduced cancer recurrence.

The debate has become heated at times regarding the breast cancer/soy controversy. The issue is complex, with some studies showing that eating soy early in life can reduce breast cancer risk. Conversely, the consumption of concentrated soy extracts has been shown to increase the proliferation of breast cancer cells in some studies. And other studies show a protective and/or neutral effect from eating whole soy foods.

Eat whole soy foods like edamame and tofu in moderation-no more than a few servings per week. Fermented soy foods such as miso and tempeh are even better options. And avoid soy protein isolates and supplements containing concentrated soy isoflavones.