We all know some snacks are better for your health than others and that includes your oral health. Cheese contains a protein called casein that coats the teeth with a protective film and helps fend off acids that attack tooth enamel. Eating cheese also increases your mouth's saliva production, which washes away sugar, bacteria and acid. Firm cheese, like Cheddar and Monterey Jack are especially good, along with Brie, Camembert and Blue cheeses. So instead of choosing a snack that's sugary and full of carbohydrates, grab a slice of cheese instead!