“Researchers in Madrid say the main psychoactive ingredient in marijuana (what is it?) and other “cannabinoids” (what are those?) could help slow cancer growth, as well as manage many cancer symptoms (like what?).  Scientists studied cancer cells (which type?) that grow faster than normal cells, and discovered that the cancer cells died whenever they were exposed to the pot ingredient.”

http://specials.msn.com/a-list/healthyliving/marijuana-fights-cancer-popular-pages