Coriolus versicolor extract
(KOR-ee-OH-lus VER-sih-KUH-ler EK-strakt)
A substance being studied in the treatment of breast cancer and other types of cancer. Coriolus versicolor is a type of mushroom. Its extract is used with other treatments in some cultures to treat cancer and other conditions. The extract may boost the immune system, slow the growth of some tumor cells, and lessen the side effects of chemotherapy and radiation therapy. It is a type of biological response modifier (BRM) and a type of dietary supplement.