While halitosis can occasionally seem like a biblical affliction or a karmic punishment, most researchers will tell you that oral odor boils down to one primary cause - bacteria. The reason oral care probiotics work so well is that they replace the source of bad breath itself.
An article posted by Real Beauty recently addressed the source of halitosis and dental decay by referring to a study conducted at Ameritech Laboratories. The experiment sought to determine the amount of microorganisms on different surfaces.
Scientists at Ameritech found that iPhones tend to be coated with an average of 1,032 bacteria per square inch (psi), compared to just 558 psi for the surface of a women's toilet seat. While this finding may be a wince-inducing way to think of your smartphone, wait until you read what researchers determined is in your mouth.
Compared to the relatively scummy iPhone, which has tens of thousands of microbes on it, your mouth has more than 1 billion individual bacteria living on teeth alone. These critters are what cause bad breath, since their digestive processes excrete foul-smelling compounds that your nose associates with halitosis.