How much hydrogen peroxide does crest whitening strips have
Crest whitening strips use a peroxide whitening gel, but the hydrogen peroxide strength varies by product and packaging label.
The short answer
Crest whitening strips contain a peroxide gel, but the hydrogen peroxide strength varies by product line and version, so check the box for the exact formulation.
Which ingredient provides the whitening effect?
The active whitening ingredient is usually hydrogen peroxide or a compound that releases hydrogen peroxide, such as carbamide peroxide. Peroxide passes into enamel and dentin and chemically breaks down some stain molecules.
How can you check the peroxide strength safely?
Read the active-ingredient and concentration information on your specific package, and use the strips only for the stated wear time. Stop if you develop marked sensitivity or gum irritation, and do not place strips over broken skin or untreated decay.
When should teeth or gums be assessed before whitening?
Arrange a dental assessment before whitening if you have cavities, cracked teeth, exposed roots, or inflamed gums. Seek care if pain persists after stopping the product or if a white gum burn does not settle.
What should you ask about peroxide and restorations?
Ask which stains are likely to respond to peroxide and whether existing fillings, crowns, or veneers will change color. Ask which product strength and wear schedule fit your enamel and gum condition.
Frequently asked questions
Is the peroxide amount the same in every Crest strip?
No. Formulation and strength can vary by product line and market, so use the label for the pack you have.
Why do strips make my teeth sensitive?
Peroxide can temporarily move through enamel and irritate the tooth nerve or exposed dentin, especially when teeth already have sensitivity.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.