10 Foods That Are Harmful For Your Teeth (Slideshow)
Apples and other fruits such as oranges are high-acid foods.
Lemons
Lemons and limes have high levels of acidity, which can wear away at the enamel of your teeth.
Ketchup and Mayonnaise
Depending on the ingredients, certain condiments like ketchup or mustard can be high in acidity.
Fruit Juices and Smoothies
While consuming a diet high in fruits and vegetables has proven health benefits, many fruit juices and smoothies have high acidity levels.
Fermented Foods
Fermented foods such as pickles or sauerkraut also tend to be higher in acidity levels.
Abalone and Seafood
According to a study released by the FDA rating the relative acidity of certain foods, abalone and other seafood often rank high on the scale of acidic foods.
Grains
This may come as a surprise, but most grains have are naturally high in acidity levels.
Milk
Milk products, and cow's milk in particular, is very high in acidity.
Tomatoes
Tomatoes are highly acidic, and are often used in soups and sauces in a meal, so it's important to take that into consideration when planning your next dinner.
Wines & Beer
Wine and beer undergo similar chemical processes to fermented foods, causing them to be very high in acidity. As a matter of general health as well as dental health, alternating glasses of wine or beer with water when drinking will help decrease acidity in your mouth.