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On ray sufrpgs -- observations. the science is poor. we have been living with that ever since. in the process we have obesity epidemic diabetes increased four fold. the usda the food guy pyramid might have gotten it right why is obesity and diabetes increasing so quickly? >> you are a science journalist. you are an md you went to stanford residency at johns h hopkins yet the nutritionnal instruction you got wasn't good? >> i thought it was. i followed it myself and told everybody around me to try to follow it. about two or three years ago i was 40 pounds over weight and prediabetic exercising ...

Was i figured out i had a significant intolerance to most of the foods i was eating. what i eat today probably looks a lot like what someone consumed in a paleoistic time. i don't add here to a certain set of rules. i will give you one example. i think a hard-core paleo person w would advocate pa dairy doesn't make sense. i found for me dairy does really well. it comes to the theme we are hearing at the individual level we have to figure out what works for us. but it is good to have science that informs that so you know you are making a reasonable starting guess as to where to go. >> there's a...

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...

Science study that attempted to answer that question. gary found about 82 studies that attempted to answer that. they were fraught with the same limitations and problems. in 2012 we don't know the answer to that question based on signs. there is anecdote tal evidence that says a calorie is not a calorie. >> one thing i know that is true you must eat less fat. yet you eat lots of fat. you are a doctor, a stanford doctor. what's that about? >> like i said about 3 or 4 years ago when i got to the point where i was too over weight to handle my own existence and my wife said i needed to be a little...

It had me questioning what it was i was believing and what it was i was preaching. >> increase carbohydrates, reduce fat from 40 to 30 percent. this was based on research that led to the lathes food pyramid that told us to eat lots of breads then vegetable fruit less meat and milk now michelle obama has her new version out called my play. it is comforting to know this is all based onset elled science. the producer found this clip of the government scientist behind the rule testifying before the senate. >> i have pleaded in my report and will plead again orally here for more research on the pro...