Can you smell that smell? Halitosis, or bad breath, is an issue everyone has come across at one time or another. So where does it come from? For most people, it originates from the foods they consume. The most common foods causing halitosis are onions and garlic; which, when eaten, are absorbed into the bloodstream and passed through the lungs and then exhaled.1 Luckily, this is temporary and is easily prevented by avoiding them in your diet. Although a quick fix is available for that kind of bad breath, the more persistent form can require professional intervention and treatment.