Herbal therapy may carry cancer danger

From Washington, D.C., at a meeting of the American Association for Cancer Research

An herbal extract that some women use to relieve symptoms of menopause increases the likelihood in mice with breast cancer that the disease will spread, researchers have found.

The extract, called black cohosh, is especially popular among women who have developed breast cancer, because hormone-replacement therapy for menopausal symptoms isn’t recommended for such women.