As a dental hygienist, I spend a lot of time talking to patients about oral hygiene — brushing, flossing, fluoride. But diet plays an equally important role in dental health, and some of the biggest culprits might surprise you. Here are five common foods and drinks that are doing serious damage to your teeth.
1. Sugary and Acidic Drinks (Soda, Sports Drinks, Energy Drinks)
This is the big one. Carbonated sodas are a double threat: they contain sugar that bacteria convert to acid, AND the carbonation itself is acidic (carbonic acid). A can of regular soda has a pH around 2.5 — almost as acidic as battery acid. Even sugar-free sodas are highly acidic and erode enamel.
Sports drinks and energy drinks are similarly problematic. Many patients assume they are healthy alternatives to soda, but most have significant sugar content and acidic pH levels.
The damage: Acid dissolves the calcium in tooth enamel in a process called erosion. Unlike cavities, which are localized, acid erosion affects broad surfaces of teeth, causing them to thin, become translucent at the edges, and eventually develop sensitivity.
What to do: Limit consumption significantly. When you do indulge, drink through a straw to bypass the teeth, never sip slowly over long periods, rinse with water immediately after, and wait 30 minutes before brushing (brushing on softened enamel causes additional erosion).
2. Citrus Fruits and Juices
Lemons, limes, oranges, and grapefruits are packed with vitamins and antioxidants — but they are also highly acidic. Lemon juice has a pH of about 2, making it one of the most acidic things you can put in your mouth.
The issue is not eating an orange at breakfast. The problem is habits like drinking lemon water throughout the day, sucking on lemon slices, or sipping orange juice for hours. This prolonged acid exposure continuously assaults enamel without giving saliva time to neutralize and remineralize.
What to do: Enjoy citrus as part of a meal rather than as a between-meal snack or drink to sip on. Rinse with water after consumption. Never brush immediately after eating acidic foods.
3. Refined Carbohydrates and Crackers
Most people think of sugar as the enemy, but starchy refined carbohydrates — white bread, crackers, chips, pretzels — are nearly as problematic. These foods break down into simple sugars almost immediately in the mouth and tend to stick in the crevices between teeth and in the grooves of molars.
Bacteria in the mouth ferment these sugars and produce acids as a byproduct. The sticky texture means the food stays in contact with teeth far longer than a sugary drink, giving bacteria a prolonged feast.
What to do: Replace refined carbohydrates with whole grain alternatives when possible. When you do eat crackers or chips, have them with a meal rather than as a standalone snack, and rinse or drink water afterward. Pay extra attention to flossing afterward to remove stuck particles.
4. Sticky Candy and Dried Fruit
Gummy bears, caramel, taffy, and dried fruit like raisins, apricots, and cranberries — all of these stick tenaciously to tooth surfaces and pack into grooves and gaps between teeth. The combination of concentrated sugar and sticky texture creates ideal conditions for cavity-causing bacteria.
Many parents are surprised to learn that dried fruit is often worse than candy for teeth. Because they are perceived as healthy snacks, children (and adults) eat them frequently and in significant quantities. A single serving of raisins can contain 25 grams of sugar and will remain adhered to teeth much longer than a liquid sugar.
What to do: Reserve sticky sweets and dried fruit for mealtimes when saliva production is highest and they are more likely to be dislodged by other foods. Always brush and floss after consuming them.
5. Red Wine and Coffee
Both red wine and coffee cause surface staining over time, but the damage goes beyond aesthetics. Red wine is highly acidic (pH around 3.3) and contains tannins that dry out the mouth, reducing the protective effects of saliva.
Coffee is acidic as well, and both beverages are often sipped slowly over extended periods — essentially bathing teeth in acid for hours.
What to do: Try to consume coffee and wine in a concentrated sitting rather than sipping throughout the morning or evening. Rinse with water afterward. Regular professional cleanings will address surface staining before it becomes intrinsic.
The Bottom Line
Good dental health is a partnership between professional care and daily habits. Being mindful about these five dietary factors — alongside twice-daily brushing, daily flossing, and regular dental visits — will make a significant difference in your long-term oral health.
Have questions about your diet and dental health? Ask Lisa or our dental team at your next cleaning. We are always happy to offer personalized advice!