Dr. Tseng is studying the effects of soy on women at high risk for breast cancer.
Soy contains compounds called isoflavones that are believed to be cancer-preventive.
But these compounds act like estrogen and may increase risk for breast cancer. Not much is known about what levels of soy are safe. This research will study levels of soy intake and their effect on breast cancer markers that appear in fluid from women s nipples. Ultimately it hopes to clarify if soy poses a risk. He is testing a promising drug that inhibits a protein that is important in the development of cervical cancer.