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Does Sugar Cause Cavities?

Today we are going to answer a common dental question. Does sugar cause cavities? This is an incredibly common question for dentists, and most people know that sugar seems to cause cavities. We’re going to take it a little bit deeper, though.


Sugar on its own isn’t necessarily bad for your teeth; however, your teeth aren’t in a vacuum. There are also different bacteria in your mouth. This bacteria in combination with sugar is harmful for your teeth and does cause cavities. When you eat or drink sugary food items, tiny bits of sugar will stick to cracks and crevices in your teeth. Again, this alone isn’t unusual or horrible, but those cracks and crevices also hold the bacteria. This bacteria generally thrives on plaque buildup and actually eats the sugar on your teeth. This may seem like a great thing, right? Wrong. This is actually the problem.

The bacteria eat the sugars, and then release different acids, which is the problem. The enamel on your teeth is one of the hardest substances in your body, but it can be fairly easily damaged by acid. If these acids sit on your teeth for an extended period of time, they will start eroding the enamel. This can then cause tooth decay to set in, and then you will be having cavities all over.

To fight cavities, you need to follow the advice of dentists. Brush your teeth twice daily and floss daily as well. Schedule your dental checkups at least twice a year and this will also help prevent cavities. If you do have a cavity, the dentist will catch it before it becomes too severe. They can fill the cavity to prevent growth of it.


The amount of sugar is not the only factor to getting tooth cavities. It is more about the length of time that it sits on your teeth. If you do eat or drink something sugary, brush and floss your teeth afterward. This will help prevent cavities, and of course, visit the dentist regularly.