Via WebMd For years, products have been marketed with the promise of helping you burn more calories. But is there really anything you can do to increase the number of calories your body burns each day? Well, yes and no, experts say. The truth seems to be that the No. 1 way to burn more calories is the old-fashioned way — by moving more. “Essentially, we know of no way to burn more calories or up our metabolism than to move more,” says Barry M. Popkin, PhD, director of the Interdisciplinary ObesityProgram at the University of North Carolina, Chapel Hill. Still, research suggests that there may be a few other ways you can…