SAN ANTONIO (EGMN) - Many breast cancer survivors take herbal supplements having estrogenic properties that lower their sex hormone levels, according to an interim report from the Health, Eating, Activity, and Lifestyle (HEAL) study.What effect, if any, these altered sex hormone levels will have on the participants' breast cancer prognosis awaits additional follow-up, investigator Dr. Sharon Wayne observed at the annual San Antonio Breast Cancer Symposium.She reported on 556 breast cancer survivors...