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Senators don't have a luxury of the research scientists are waiting until every last sled of evidence is in. >> politicians as usual went off and sold us a bill of goods. >> that is one way to look at it. the head of the national acanned me of science said we are about to engage in the huge nutritional experiment you have the american public is the subject and then you have 30 years later we have gotten sicker and sicker. >> there's much more information about nutrition and not getting fat and we are fatter. >> it can be fixed with good signs. >> you have a book out called good calories bad ca...

That is not going to make the difference? >> more about what they're eating than anything else to tell you the truth. heather: okay. >> people try to lose weight by exercising. it is not an effective way to lose weight. helps the heart but best way to lose weight is stop eating. heather: stop eating bad food. >> you want to take in fewer calories than you expend. that it problem we're not. we go to the movies, look what you get. you get a popcorn like this. what do we do about it? does the government have to legislate and tax things? we don't like that. heather: what is the solution? >> i thin...