Crest Whitestrips are over-the-counter (OTC) teeth whitening products designed to remove surface and deep stains from your teeth using a peroxide-based formula. The strips are thin, flexible, and coated with a whitening gel. You place them directly onto your teeth and leave them on for a set amount of time (usually 30 minutes).
The active ingredient in most Crest Whitestrips is hydrogen peroxide (H₂O₂) or sometimes carbamide peroxide, both of which are commonly used in professional dental whitening. These compounds break down into oxygen molecules, which penetrate the enamel and dentin (the layers of your teeth), oxidizing the stain molecules that discolor your teeth.
When peroxide breaks down, it releases free radicals that target colored compounds in your teeth. These compounds are broken into smaller, less pigmented molecules, making your teeth appear whiter.
How Effective Are Crest Whitestrips? What Studies Say
Crest Whitestrips have been studied for both efficacy and safety. One widely cited clinical study published in the Journal of Clinical Dentistry showed that users experienced a significant shade reduction (whitening) after using Whitestrips for just 7 to 14 days.
Crest Whitestrips use a precise blend of ingredients designed to deliver whitening without damaging your enamel:
| Ingredient | Function |
|---|---|
| Hydrogen Peroxide | Primary whitening agent |
| Carbomer | Helps gel stick to teeth |
| Sodium Hydroxide | pH balance and gel stability |
| Glycerin | Moisturizer to prevent drying |
| Water | Solvent and consistency builder |
Yes — according to the American Dental Association (ADA), peroxide-based whitening agents are safe when used as directed. Crest Whitestrips are ADA-accepted, meaning they meet strict criteria for safety and effectiveness.