Know the Culinary Culprits
The foods you eat can exert a lot of influence on the way your breath smells. So, if you're one of the 90 million people in America who have bad breath, it's time to examine your dinner plate.
You probably expect some foods to give you bad breath, such as garlic or onions. But some bad-breath culprits may surprise you. Take meat, for example. Meat particles are known for sticking around, even after you've swallowed your bite of steak and washed it down with a gulp of water. These meat particles collect at the gumline, get stuck between teeth, and sometimes work their way under fillings or crowns -- and are especially attractive to reproducing bacteria.
High-protein and low-carb diets, while a possible boon to your waist size, aren't great for your breath. Eating fewer than 100 grams of carbohydrates a day triggers a condition known as ketosis, a metabolic state that causes your body to burn fat instead of sugar. Ketosis is notorious for causing bad breath [source: Gazzaniga, WebMD].
However, if you're committed to being a carnivore you can still freshen your breath by doing one simple thing with the world's most common liquid. Find out what in the next section.