Whitening Toothpaste

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    Teeth Whitening in 2026: What Actually Works, What Causes Sensitivity, and What Is Mostly Marketing

    Dr Cindy Li, DDSByDr Cindy Li, DDS Hours Reading Time: 7 minutes

    Teeth whitening claims can be confusing. This plain-language guide explains what really changes tooth colour, why sensitivity happens, what whitening toothpaste can and cannot do, and why a dental exam matters before you start.

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