Does This Bacteria Make My Butt Look Big?

Certain types of intestinal bacteria may interfere with a hormone that regulates metabolism and weight.

"Gordon and Backhed base their claim on a study of two groups of mice, one exposed to normal intestinal microbes and another raised in a germ-free bubble. The germ-free mice had 42 percent less body fat, even though they were fed one-third more calories. When the animals were inoculated with bacteria from their normal counterparts, the bubble mice increased their body fat by 57 percent in just two weeks."

In my case, I'm sure it's much more a case of brie and brulee in the intestines that contribute to whatever chub I may be trailing.