Happy young woman looking at her reflection while rising her mouth.

The Best Whitening Mouthwash: What to Look For

Who would say no to a whiter smile? With so many at-home whitening treatments available, you have more options than ever before to brighten your teeth. A whitening mouthwash can help supplement your oral care routine, so you get the teeth whitening results you want. Find out how a simple swish can impact your smile so that you can choose the best whitening mouthwash for the job.

What Is a Whitening Mouthwash?

Whitening mouthwash contains a bleaching agent called hydrogen peroxide to help remove surface stains from your teeth. You regularly rinse your mouth with the whitening solution to change the colour of your teeth. The best whitening mouthwash will include ingredients that do more than whiten your teeth, such as fluoride to strengthen your enamel or cetylpyridinium chloride to kill the germs that cause plaque and bad breath.

How to use a whitening mouthwash

For a whitening mouthwash to be effective, you need to consistently make it a part of your oral care routine. A study in the Scientific World Journal, a peer-reviewed, open access journal published by Hindawi (based in the United Kingdom) showed that hydrogen peroxide mouthwashes increased teeth whiteness over time but found no significant colour changes in the first 56 days. To get the most out of your whitening mouthwash, follow the instructions on the back of the bottle and commit to using it in the long term. Most products will require you to swish the solution around your mouth for 60 seconds twice a day. Remember not to swallow!

How to Get the Best Teeth Whitening Results

Whitening mouthwash works best when combined with other at-home and professional teeth whitening treatments, according to Restorative Dentistry & Endodontics. In South Africa, whitening mouthwashes are formulated to contain a low concentration of hydrogen peroxide. In comparison, the bleaching products used by your dentist tend to contain a much higher concentration. The Scientific World Journal study found that even at-home whitening gels with 10 percent carbamide peroxide worked better than mouthwash to whiten teeth when the gel is applied directly to the tooth. Other whitening techniques include toothpaste, whitening strips, over-the-counter gels, take-home trays, and professional whitening treatments.

Talk to your dental professional about the best way to improve the colour of your teeth. Your dentist or dental hygienist can determine if you are a good candidate for whitening treatments and recommend the best whitening technique for your situation.

Remember that mouthwashes and mouth rinses do not replace regular brushing and flossing. Protecting your teeth from cavities is the first and most important step to a more beautiful smile. Explore how a whitening mouthwash can accompany your oral care routine and other whitening products to help your pearly whites shine.


The above information is provided for informational purposes only. Colgate does not accept any liability should the above recommendations have an outcome contrary to the intended result. Always seek the advice of a qualified doctor or dental professional. Do not disregard professional advice or delay seeking it because of something you have read in this article.

Not all Colgate products contain hydrogen peroxide. Optic White Expert is the only product in our toothpaste range that contains hydrogen peroxide.

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