Most best teeth whitening methods target exterior surface stains. Those that whiten internal stains rely on bleaching agents like hydrogen peroxide or carbamide peroxide to seep into interior tooth tissues and lighten tooth color from the inside out, says Casellini.

Look for a low abrasive formulation to avoid wearing down enamel, as well as a high fluoride content to protect teeth. The best products will include ingredients approved by the ADA and come in various forms including gels, strips and trays.

1. Colgate Optic White Toothpaste

Whitening toothpastes use mild abrasives to remove surface stains from teeth. They do this by scratching the enamel, or hard outer shell of your teeth, to expose the softer inner dentin layer.

These toothpastes are usually safe to use, but you should always follow the instructions on the packaging. They contain enamel-protecting ingredients, like fluoride.

The Colgate Optic White family of products includes whitening toothpaste, mouthwash, and toothbrushes. They are enamel-safe and can be used daily.

This toothpaste is formulated to work on natural teeth. It will not whiten dentures or other dental work. Best results are achieved after 4 weeks of twice-daily brushing. This product can be used with Colgate 360 Degree Optic White mouthwash and a regular toothbrush to achieve a brighter smile.

2. Crest 3D White Toothpaste

Upgrade your oral care routine with this Crest 3D White toothpaste that removes everyday surface stains, even in hard-to-reach areas of the mouth after just one brush. This whitening toothpaste also strengthens teeth by repairing weakened enamel caused by erosion from common acids.

Its patented enamel-safe teeth whitening ingredient polishes away stains to gently whiten, while leaving your mouth feeling cool and fresh with every brush. It also provides a healthy mouth by helping to prevent cavities with its fluoride anticavity.

This whitening toothpaste from Crest comes in a variety of different options to fit your needs, including sensitivity and whitening for sensitive teeth. You can also find this whitening toothpaste in a Value 5-Pack, which contains more than six regular-sized tubes. Its ADA Seal of Acceptance helps you feel confident you’re getting quality oral care.

3. Crest 3D White Whitening Strips

Whitening strips are a convenient at-home option for those with less time to devote to more involved whitening treatments. These enamel-safe strips deliver a noticeable difference in just 10 days and work to break up stains that have accumulated on your teeth over the years. Plus, Crest’s Advanced Seal Technology creates a no-slip grip so they won’t shift or fall off while you wear them.

Commerce Updates writer Jessie Quinn says these strips work quickly and effectively, claiming her sensitive teeth didn’t experience any sensitivity while using them for 30 minutes a day for 10 days. She also appreciates that the kit comes with extra strips for touch-ups down the line.

As with all whitening products, it’s important to keep in mind that the results from these at-home strips are gradual and will require some patience. If you’re looking for a more dramatic change, a trip to the dentist is a safer and more effective option.

4. Crest 3D White Whitening Gel

Known for their effectiveness and affordability, Crest 3D White Whitening Strips are clear plastic strips coated with a tooth-whitening gel that contains peroxide. They’re designed to conform to the shape of your teeth and keep the whitening gel in place to remove surface stains.

They’re also formulated to strengthen your teeth, and leave your breath and mouth feeling clean and refreshed. Plus, this Value 5-Pack has more whitening toothpaste than six regular-sized tubes.

To use, simply peel and apply. Do not use on dental work, restorations or braces. To avoid gum irritation, do not apply for more than 60 minutes. Use once a day for best results. See package for full instructions.

5. Crest 3D White Whitening Trays

Crest is a brand name you can trust—their products carry the ADA Seal of Acceptance that those janky Amazon-only options can’t match. The whitening strips in this kit contain hydrogen peroxide to lift and whiten teeth for noticeable results.

Izhaky says the best time to use these whitening strips is before bed, but you can apply them at whatever time works for your schedule. Just be sure to follow the directions on the packaging—they recommend leaving them on for 14 days.

Some people might experience tooth sensitivity or gum discomfort, but this typically lasts for a short amount of time and can be easily remedied. It’s also important to note that whitening products only lighten natural teeth—they won’t do anything for restorations like fillings and crowns.