that muscle will say, hey, i'd like some of that glucose, the falt says, i would like some of that gleekose, the cancers have learned how to do that as well? >> yes, they have evolved the ability to hijack that flow of glucose going by in the blood stream into thetumeterself. >> they're working on developing drugs that will cut off the glucose supply to cancer cells can chemothem from growing. until there's a breakthrow, his advice, don't eat sugar. if you must, keep it to a minimum. >> in fact, i live my life that way. i rarely eat sugar. when you see a sugary drink or if i were to offer you one, with all that you know, what's going through your mind? >> i probably would turn it down and get a glass of water. >> but for most of us, that's easier said than done. >> turns out sugar is much more addictive than we had realized early on. >> eric, a neuroscientist at the oregon research institute is using functional mri scanners to learn how our brains respond to sweetness. >> sugar activates the brain in a special way that is very reminiscent of a drug like cocaine. >> that's right, cocaine. >>