What Causes Bad Breath?

Typically, the culprit is your tongue or to be more specific, the white film that builds up on your tongue while you sleep.  It's estimated that 60% of halitosis cases can be attributed to bad smelling sulfuric compounds produced by this layer of microorganisms and dead cells.  The solution:  Try regularly brushing your tongue, back to front, using a soft-bristled toothbrush.