Bad breath, medically called halitosis, can result from poor dental health habits and may be a sign of other health problems. Bad breath can also be made worse by the types of foods you eat and other unhealthy lifestyle habits.

How Does What You Eat Affect Breath?

Basically, all the food eaten begins to be broken down in your mouth. If you eat foods with strong odors (such as garlic or onions), brushing and flossing -- even mouthwash -- merely covers up the odor temporarily. The odor will not go away completely until the foods have passed through your body.
If you don't brush and floss teeth daily, food particles can remain in your mouth, promoting bacterial growth between teeth, around the gums, and on the tongue. This causes bad breath. Antibacterial mouth rinses also can help reduce bacteria.
In addition, odor-causing bacteria and food particles can cause bad breath if dentures are not properly cleaned.