What, exactly, is making us fat? With overweight trends and obesity numbers reaching epidemic proportions, much research and dialogue has been committed to help us unravel the maze that is unwanted weight gain. With a seemingly endless array of hypotheses to test, however (could obesity be caused by a virus?), getting to the bottom of this question is not easy. Thanks to a new study published this month in the journal PLoS Medicine, however, we now know a little bit more about this complex issue.
In the study, researchers from the University of North Carolina used data from four other studies of U.S.
