There was this great article that came out of Peabody University several years back that linked pobesity with overgrowth of microorganisms. I lost it and cannot find it at the moment. I will see if I can find it and will post it. It was very interesting. 

This article came to me yesterday, which, is kind of the same point only from the opposite side of the spectrum. In the Peabody study, it argues overgrowth contributes, in this study it is that the good organisms have been diminished and that can cause you to be overwiehgt. However, the link between those two issues illustrates how important the balance of organisms is in our intestines!

Here is the article: http://vitals.nbcnews.com/_news/2012/08/22/13399483-antibiotics-may-help-make-you-fat-studies-show?lite