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How long do OTC tooth whiteners take to work?

Most people who use OTC, or over-the-counter, tooth whiteners see improvements within a few weeks. Tooth whiteners contain bleach, which eliminate stains and turn teeth a lighter shade. The whiteners you purchase at a pharmacy or grocery store contain a relatively weak solution of bleach. Tooth whiteners applied by dentists contain a higher concentration of bleach, so they work faster and have more dramatic results.
The rate at which you see results with OTC tooth whiteners depends on the type of whitener you are using. In general, OTC tooth whiteners take a longer time than professional methods to produce results. This is because they contain a lower concentration of peroxide. Typically, an OTC tooth whitener can take anywhere from one to four weeks to produce results.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.