If good hygiene doesn't eliminate the unpleasant smell from your body, you can try consuming more good bacteria. Research suggest that persistent bad breath or body odor can be caused by excess bad bacteria in the mouth, gut or anywhere in the body. Replenishing good bacteria(probiotics) helps create a balanced gut system and inhibit the growth of undesirable microorganisms in the body. In addition, eating prebiotics include pectin, inulin and oligosaccharides help to promote more probiotic growth and activity. Prebiotics simply act as food for the good bacteria.