http://cancer.gov/cancertopics/pdq/cam/essiac/HealthProfessional/page1
National Cancer Institute, National Institutes of Health
This complementary and alternative medicine (CAM) information summary provides an overview of the use of Essiac and Flor•Essence, which are proprietary herbal tea mixtures, as treatments for patients with cancer. The summary includes a brief history of the development of Essiac and Flor•Essence; a review of laboratory, animal, and human studies; and possible side effects associated with Essiac and Flor•Essence use.