Halitosis, a term derived from the Latin word halitus (breath) and the Greek suffix -osis is used to describe an unpleasant odour in expired air originating from oral or systemic sources. 1,2 The main compounds causing the unpleasant odour are volatile sulphur compounds (VSCs) that are produced by gram-negative anaerobic bacteria. 1 Studies have shown that, in the majority of cases, halitosis originates from the oral cavity, and the rest are caused by infections of the upper respiratory tract, systemic diseases, such as liver cirrhosis, diabetes mellitus or renal diseases, or exogenous reasons, such as alcohol consumption, smoking and eating certain odoriferous foods. [3][4][5][6] The
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