You may be surprised if you had guessed Candy being worst as compare to Pretzels.
Here is the truth about Sticky and Refined Carbohydrates: Foods such as chips, pretzels, bread, pasta or crackers can be as harmful to the teeth as candy. Bacteria feed on sugar that comes from any forms of carbohydrate. And the more refined or cooked a starch, the more likely it is to stick to your teeth and raise acid levels in the mouth. (Raw starches in vegetables tend not to harm tooth enamel as much) Acid weakens the enamel and make it prone new and recurring cavities.