The journal Molecular Systems Biology reports that mice fed probiotic drinks had different levels of key chemicals in their blood and urine. These mice were better able to break down fat in their body. In theory, researchers say, this might mean more fat passing undigested through the body rather than being absorbed.
Probiotics can be found in yogurt or taken in pill or powder form. The belief is the friendly bacteria can get rid of harmful bacteria by competing more strongly for their food.