The reality is our eating habits play a major role in tooth decay, which is a diet-related disease. Sugars in the food and drinks we eat are taken up by bacteria, producing acids that attack the outer layer of tooth enamel to cause decay.
Our saliva helps our teeth recover from these attacks through a process of neutralising the acids. However, if we frequently snack between meals, there is no rest period for teeth to undergo this recovery process, which may mean that, over time, a cavity form as a result of these sustained acidic attacks.
Read more about how eating and drinking affect oral health by downloading the Diet & Oral Health Fact Sheet provided by the ADA: