This study will change markets!

The Washington Post reports a 20 year 120,000 respondent study by Harvard on US eating patterns and weight change. 
The federally funded study found striking differences in how various foods and drinks — as well as exercise, sleep patterns and other lifestyle choices — affect whether people gradually get fatter.

The findings suggest that its not just calories in calories out that is the only variable - its also where the calories came from and the different effects of various foods on how our bodies convert energy.
I'm guessing that this study is going to launch numerous new diets and some fascinating new food claims. I'm just glad I'm not working with a potato client today!