Protecting Your Teeth
Your diet (which includes what you drink) plays a major role in tooth decay and enamel erosion. Your mouth is naturally hospitable to all kinds of bacteria. Some of these microorganisms are helpful and some are harmful, and many of the harmful ones thrive on a steady supply of sugar. As they process sugar from your diet, these bacteria produce acids that can eat into the enamel of your teeth, forming small holes called cavities. If left untreated, tooth decay can worsen, become quite painful, and threaten the survival of teeth.
That's why it is important to avoid food and drinks with added sugar. If you have a sugar craving (and we all do from time to time), choose fresh fruit or yogurt instead of a donut or candy bar. Fortunately, there is no evidence that sugars in whole grain foods, whole fruits and vegetables, and in starch-rich staple foods like bread, rice and potatoes are harmful to teeth.
Soft drinks, however, are a double whammy for teeth; many not only contain lots of sugar — up to 10 teaspoons per 12-ounce can — but they are also highly acidic. This means they erode teeth on contact, even before the bacteria in your mouth have processed the sugar these drinks contain. But even if they are sugar-free, the acid can still harm your teeth. So it might be best to avoid soda, sports drinks, energy drinks and canned iced tea. If you do occasionally have a soda, swish some water in your mouth afterwards — but don't brush your teeth for at least an hour! Doing so could make it easy for tooth enamel, already softened up by acid, to be eroded away by brushing.
Drinking lots of water can help you maintain a healthy supply of saliva, which protects teeth by neutralizing acid. You can also neutralize the acid in your mouth after a sugary snack by following it up with a piece of cheese.
Finally, remember that it's not just what you eat that affects the level of acidity in your mouth — it's also when. Snacking throughout the day, especially on chips, crackers, cookies or candy, means that your saliva never gets the chance to neutralize the harmful acids being produced. So if you eat sweets, do it only at mealtimes. As an added incentive, you may find this helps you maintain a healthy weight, too!