Nutrition
Give your jaw a workout. When you eat, chew your food thoroughly, Dr. Replogle advises. Chewing stimulates saliva flow.
Choose your foods carefully. Certain foods are notorious for causing bad breath, such as coffee, alcohol, certain cheeses, and garlic and its close relatives (onions, chives, leeks, and shallots). When you consume these foods, the offensive odor emanates not only from your mouth but also from your lungs, Dr. Replogle explains. The foods contain malodorous sulfur compounds, which enter the bloodstream during digestion, travel to the lungs, and then get exhaled.
Even exemplary oral hygiene can't prevent bad breath that originates in the lungs. So if you're worried about your breath, you're better off avoiding problem foods altogether.
Consider meatless meals.