The Global Energy Balance Network released a study claiming that exercise, and not diet, is the best way to prevent weight gain. Many nutritionists, already dubious, are highlighting one of the research institute's biggest funders-- Coca Cola, as deeply problematic.

Jim and Margery dug into the politics of science research with medical ethicist,Art Caplan, who weighed in on the self-serving research, saying "science isn't science unless it's independent." He goes on to call  for "a critical eye" on research of this nature.

The research itself is adamant. "Most of the focus in the popular media and in the scientific press is that they’re eating too much, eating too much, eating too much, blaming fast food, blaming sugary drinks and so on," Dr. Steve Blair writes on the Global Energy Balance Network website. He continues, "there’s really virtually no compelling evidence that that in fact is the cause. Those of us interested in science, public health, medicine, we have to learn how to get the right information out there."

But is it right? Art Caplan dismisses this claim. "Weight is complicated, everybody is different" in terms of what makes them control their weight," he admits, "and patterns are going to be individualized." However, "no nutritionist would say that the empty calories of colas are vital to the American diet." And diet continues to be an important part of a healthy life style. "

You have to walk 30 minutes for one can of coke," he cautions.

>>To hear more from our conversation with Art Caplan, please click on the link above.