Are whitening strips bad for your teeth?

Are whitening strips bad for your teeth?

Not when used as directed, according to Cleveland Clinic, which says whitening is considered safe overall, that the products have been used for decades, and that cavity risk and tooth fractures have not been shown to increase after whitening. The risk comes from overuse. The ADA says overuse of over-the-counter products such as strips, pens and gel trays may damage the enamel and gums, cause tooth sensitivity and lead to translucent-looking teeth.

Do whitening strips damage enamel?

Peroxide is the active ingredient, and the ADA says hydrogen peroxide can make enamel more porous and expose the underlying dentin, and that regular bleaching can lead to erosion, while occasional bleaching is typically offset by natural remineralization from saliva and diet. Healthline says high peroxide concentrations can damage tooth structure and increase demineralization, and that risk increases with higher peroxide concentration and longer application time.

Cleveland Clinic adds that lab studies suggest aggressive bleaching may cause erosion and microstructure changes and that whiteners may react with restorations such as ceramic crowns and sealants, though those studies used lab samples, not living teeth.

How often can you use whitening strips?

Follow the product. Healthline says the typical regimen is twice daily for about two weeks, each application lasting about 30 minutes, with some products needing only one daily application. Cleveland Clinic says frequency depends on the concentration of the bleaching agent, with some products used for a week and others for two weeks or longer, and warns, 'You don't want to overdo it.' The ADA suggests that people who want whiter teeth see a dentist for professional treatment, limited to about one or two sessions a year.

None of the sources we read sets an exact number of courses per year for strips, so ask your dentist how often is safe for your teeth. Do not extend the wear time or add extra strips.

What side effects to expect

Healthline says sensitivity is usually mild, starts during treatment and lasts several days, and gum irritation may begin within a day and typically last several days. Cleveland Clinic says temporary sensitivity and gum irritation are common when starting a product, usually resolve quickly and are not a sign of long-term damage. If they occur, take a break, switch to a milder product or ask your dentist.

Who should be careful

ADA MouthHealthy says whiteners do not work equally on all discoloration and that caps, veneers, crowns and fillings will not whiten. Cleveland Clinic says gum disease and cavities should be addressed before whitening and that brown or gray discoloration may need treatment a kit cannot provide. Healthline says home products are best for mild discoloration and that chlorine dioxide strips have debated safety. Look for the ADA Seal of Acceptance.

Is coconut oil good for your teeth?

The ADA says there is no reliable scientific evidence that oil pulling whitens teeth or reduces cavities, and does not recommend it as a dental hygiene practice, advising brushing twice a day for two minutes with fluoride toothpaste, flossing once a day and not using tobacco. Cleveland Clinic says cooking oils, apple cider vinegar and activated charcoal may damage teeth over time with little to no evidence they work.

Tips to protect your teeth

Brush gently with a soft brush, as our guide on brushing before or after strips explains, and wait at least 30 minutes after brushing before applying strips. Limit staining foods and drinks and use whitening products as touch-ups, as Healthline suggests, and avoid tobacco.

Frequently asked questions