Smoking of any sort can cause bad breath. Cigarettes, cigars, marijuana and other illegal drugs can all sour the oral environment, as can salvia, a legal, hallucinogenic halitosis agent that singer Miley Cyrus was recently caught smoking.
According to TMZ, which first published the video of Cyrus smoking the drug out of a water pipe, the singer likely consumed salvia divinorum, a tropical plant used for its brief but intense psychotropic high.
Currently, salvia may be legally purchased in 35 states, the news site said, but Cyrus has received much criticism for her experimentation with it. Besides its psychoactive properties, smoking salvia can lead to pungent halitosis.
When smoked, the plant itself must be burned at a relatively high temperature for its active compound, salvinorin, to be released. Inhaling smoke and hot gases can dry out the tongue and palate, leaving the mouth primed for anaerobic bacteria growth.
The spread of microorganisms in a dry mouth means that sulfuric compounds, created by anaerobic bacteria in abundance, can find their way into each exhalation, causing string bad breath.
The easiest way to prevent such a stink is to avoid smoking. Once bad breath has occurred, swishing a mouthful of specialty breath freshener may neutralize those odor compounds that cause halitosis.