With just five minutes of daily use, Crest Whitestrips Daily Multicare can gradually whiten your teeth for a brighter smile. Use the strips when it's convenient - while checking email, before bed, or in the shower. Once you've achieved the level of whiteness you want, use them to maintain your pearly whites. Crest Whitestrips Daily Multicare works in three ways: Removes surface stains Whitens by deep cleaning Protects enamel from the build-up of everyday stains Teeth Whitening - You Have a Choice! All Crest Whitestrips teeth whitening kits have been shown to be safe and effective in extensive clinical and laboratory testing when used as directed. In fact, Crest Whitestrips is the #1 dentist-recommended brand of teeth whitening system in the US. Everyone's teeth are stained for different reasons. Drinking coffee and tea, aging, diet and tobacco use are a few reasons why teeth are not as white as we would like. For this reason, teeth whiten at different rates. If you have more stubborn stains, it may be necessary to use a second box of Crest Whitestrips to achieve your desired whitening results. But no matter your needs, schedule or budget, we have the Crest Whitestrips product that best suits your smile.