Israeli researchers have discovered that extracts inside the edible Oyster mushroom contain molecules that bind themselves to cancer cells and kill them.
http://uk.reuters.com/video/2012/12/09/mushroom-lab-tests-raise-hopes-for-cance?videoId=239761507
https://www.huji.ac.il/dataj/controller/ihoker/MOP-PROJ_LINK?project_id=010095&Save_t=