Researchers have identified a genetic cause for chronic bad breath, also called halitosis. While most cases of bad breath are linked to bacteria growing in the mouth, up to 3% of the population have chronic halitosis of no obvious cause.

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Researchers have identified a genetic cause for chronic bad breath, also called halitosis. While most cases of bad breath are linked to bacteria growing in the mouth, up to 3% of the population have chronic halitosis of no obvious cause.