Bad breath is mainly caused by volatile sulphur compound (hydrogen sulfide, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide) that are produced by the metabolism of a group of oral bacteria.
These bacteria habitat in:
* between teeth and gums
* dental cavities
* food traps
* defective dental fillings or crowns, bridges and dentures
Other causes of bad breath are:
* gum disease
* oral infection
* social habits, like smoking
* food intake
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