Tooth Erosion From Acidic Foods and Drinks: Signs and Prevention

Sugar gets most of the blame for dental problems, but acid can harm teeth directly, even in drinks with no sugar at all. The American Dental Association (ADA) calls this tooth erosion: acids in food and drink wear away enamel, the hard outer layer that protects each tooth. This guide explains how erosion differs from cavities, which foods and drinks the ADA flags, the signs to watch for and the habits that protect your enamel.

Erosion vs cavities

Both involve acid, but the acid comes from different places.

• Cavities: The National Institute of Dental and Craniofacial Research (NIDCR) explains that bacteria in plaque use sugars and starches to make acids, which pull minerals out of enamel. Repeated attacks can form a cavity.
• Erosion: The ADA describes acids that come straight from foods and drinks and wear away enamel. This changes how teeth look and opens the door to bacteria that cause cavities or infection.

Many drinks deliver both. The ADA notes that juice, soda and sports drinks can leave sugar behind, and many also contain added acids (phosphoric, citric or malic acid) that erode enamel. For more on decay, see our tooth decay and cavities guide.

Why erosion matters: it’s permanent

The ADA states that tooth erosion is permanent. Once enamel wears away, you may:

• feel pain or sensitivity with hot, cold or sweet drinks
• notice yellowish discoloration
• find that your fillings have changed
• face a greater risk of cavities over time
• in very extreme cases, develop an abscess or lose a tooth

According to the ADA, repairing erosion can require fillings, crowns, a root canal or even removal, and veneers may restore appearance. If sensitivity is your main symptom, see sensitive teeth: causes and treatment.

Foods and drinks to watch

The ADA’s quick rule: if something is citrus or citrus-flavored, carbonated or sour, limit how much you have.

Soft drinks and sports drinks

The ADA calls soft drinks, especially soda and sports drinks, the major erosion culprit. Sugar-free versions are not off the hook. The ADA explains that carbonation raises the acid level of any drink, whatever its flavor, and says most carbonated soft drinks, including diet soda, are acidic.

Citrus drinks and flavorings

Lemon, lime and orange flavorings add acid. The ADA notes that even all-natural orange juice or fresh lemonade is more acidic than water and suggests treating them as occasional drinks rather than a daily habit. It also cautions that lemon or lime in water, while refreshing, is not always the best choice for your teeth.

Sour candy

The ADA says many sour candies use citric acid to get their tang, and advises enjoying them in moderation.

Acidic but nutritious foods

Tomatoes and citrus fruits are healthy, but the ADA says they can affect enamel. Eat them as part of a meal, not on their own.

How you drink matters as much as what you drink

Erosion and decay both depend on how often and how long teeth are bathed in acid. NIDCR explains that frequent eating and drinking keeps enamel losing minerals because it never gets time to repair. The ADA advises:

• Don’t swish or hold it. With a soft drink, sip and swallow rather than holding it in your mouth.
• Use a straw if you do have acidic drinks.
• Finish in one sitting. For sweetened drinks, the ADA’s advice is “drink, don’t sip.” Sipping over a long period gives bacteria more time.

Protective habits

• Wait an hour before brushing after acidic foods. The ADA says this gives saliva time to wash away acids and re-harden enamel.
• Rinse, or reach for dairy. After acidic meals or drinks, the ADA suggests rinsing with water, drinking milk or eating cheese. Dairy and other calcium-rich foods help neutralize acid.
• Keep saliva flowing. Saliva keeps acids in check. The ADA suggests chewing sugarless gum with the ADA Seal.
• Make water your default. The ADA notes that water rinses the mouth and dilutes acids, and fluoridated tap water helps protect against cavities.
• Look for the ADA Seal. The ADA says some products earned the Seal specifically because they help prevent and reduce enamel erosion from dietary acids.

Dry mouth leaves teeth with less saliva to buffer acid. If that applies to you, see dry mouth and your teeth.

Talk to your dentist

The ADA encourages asking your dentist how your food and drink choices affect your teeth. A dentist can spot early wear you may not see and suggest changes before more enamel is lost.

Frequently asked questions

Is diet soda safe for my teeth?

It has no sugar, but the ADA says carbonation makes it acidic, and most carbonated soft drinks, including diet soda, are acidic and therefore bad for your teeth.

Is sparkling water a problem?

The ADA lists plain sparkling water among healthier low-sugar options, but also notes that carbonation raises a drink’s acid level. Flavored versions with citrus add more acid. Plain still water remains the safest everyday choice.

Can enamel grow back?

No. The ADA describes erosion as permanent. NIDCR notes that saliva and fluoride can help enamel replace minerals early in the decay process, which is why prevention matters.

Should I brush right after drinking orange juice?

The ADA advises waiting an hour after acidic foods before brushing.

Sources

• ADA MouthHealthy: Dietary Acids and Your Teeth
• ADA MouthHealthy: Sugar, Drinks and Dental Health
• ADA MouthHealthy: Dental Health Drinks
• ADA MouthHealthy: Foods That Damage Your Teeth
• NIDCR: The Tooth Decay Process

By the Dentist Review Editorial Team.

This article is for general information only and is not medical advice. Talk to a licensed dentist about your own situation. See our disclaimer.

Featured image: “Glass cola” by pic_p_ter, via Wikimedia Commons, in the public domain. Resized and compressed for the web.