Since almost all oral odor originates in a biofilm that coats the tongue and palate, using an oral care probiotic product can be a good idea when you have halitosis. Recently, a group of dental health experts explored the causes, both oral and extra-oral, of bad breath.
Their conclusions, which appear in the journal Minerva Stomatologica, indicate that halitosis is most closely associated with plaque and tongue coating. Both of these conditions occur because of the millions of microbes that live in the mouth.
At any given time, up to 600 strains of microorganisms live in your mouth. While many of these critters are harmless, and a few are even beneficial, there are dozens of species known to contribute to oral odor.
As you consume food and beverages, proteins, sugars and carbohydrates are left on the tongue. Over time, bacteria break these food particles down, emitting volatile sulfur compounds as a byproduct of their digestion.
Replacing these microbes with new varieties that don't cause odor can dramatically improve the aroma of one's mouth, especially when combined with products that neutralize sulfur compounds.