Garlic, onions and beer are among the usual suspects for bad breath, known medically as halitosis. The actual culprit may not be food though, but bad toothbrushing habits or sometimes even an underlying health condition. Bacteria in your mouth are usually to blame for the unwanted odour. And what you eat naturally plays a role too. “Bad breath is often caused by certain foods or poor oral hygiene,” points out dentist Dr Christoph Sliwowski. “When bacteria in your mouth break down food particles, unpleasant-smelling sulphur compounds are produced.” If you don’t brush your teeth and tongue regul…