By far the biggest threat to teeth is sugary and starchy food. These carbohydrates ferment, causing the bacteria in the mouth to produce acids. Those acids can quickly eat away at the enamel of teeth. As a result, this creates tiny pits where tooth decay can form.

Most of us assume that sugary candy is the worst offender. But sweetened carbonated beverages, such as colas, can be even more dangerous, since carbonation increases acid levels in the mouth. Some recent studies have singled out sports drinks as a particular threat to tooth enamel.

Diagnose and treat underlying medical conditions like acid reflux and bulimia.