Crest whitestrips levels
Whitening strip levels usually distinguish formulas or treatment intensity, so active ingredients, contact time, and directions matter most.
The short answer
Strips hold peroxide gel against the front surfaces of teeth. Versions may vary in peroxide content, strip shape, contact time, or schedule.
Why do strip versions differ in strength and schedule?
Read the exact directions, use strips only on intact teeth and healthy gums, and stop for marked sensitivity or soft-tissue irritation.
How should you use strips while protecting your gums?
See a dentist with cavities, enamel defects, gum recession, restorations, or a single dark tooth.
When should a dentist assess your teeth before whitening?
Ask which active ingredient and concentration the product contains and whether restorations will change color.
Frequently asked questions
Can different factors cause differences between strip levels?
Yes. Similar symptoms can arise from different dental tissues, so an examination separates them.
What should I avoid?
Avoid caustic home remedies and stop any product that causes marked pain or soft-tissue irritation.
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.