Inside your mouth lives a wide variety of anaerobic bacteria and it responsible for contributing a rich flora population. Bad breath and bacteria is not considered to be a problem under normal circumstances for the reason that there is a balance that exists between anaerobic and aerobic populations. Anaerobic bacteria are the causes of bad breath and they reproduce better in low-oxygen environments and their aerobic counterparts prefer the opposite. They best way to prevent bad breath is to keep the mouth hydrated and salivated, you can observe drinking adequate amount of water and use an all natural bad breath remedy that does not cause mouth dehydration.