Whitening strips come in a range of strengths, from gentle formulas designed for sensitive teeth to powerful professional-grade treatments that tackle years of deep staining. Choosing the right strength is not just about getting the whitest smile possible; it is about matching the product to your teeth, your sensitivity level, and your whitening goals. With so many Crest Whitestrips variants available, picking the wrong strength can mean underwhelming results or unnecessary discomfort. This guide walks you through every factor you need to consider so you can confidently select the perfect whitening strip strength for your situation.
How Whitening Strips Work
Whitening strips are thin, flexible pieces of polyethylene coated with a hydrogen peroxide gel that acts as both the bleaching agent and adhesive. When placed on the teeth, the hydrogen peroxide penetrates the enamel and breaks down discolored molecules called chromophores, leaving the tooth visibly lighter.
Hydrogen peroxide is the active ingredient in virtually all whitening strips. The concentration of this peroxide determines the strip's strength. Higher concentrations deliver more peroxide to the tooth surface per session, which translates to faster and more dramatic whitening.
Understanding Strength Levels
Whitening strip strength is a measure of the hydrogen peroxide concentration in the gel formula. Crest Whitestrips range from approximately 6% up to 14% hydrogen peroxide across different product lines. Entry-level products now typically contain around 10% hydrogen peroxide and require 30-minute daily applications.
Mild Strength (6%-8% H2O2)
Mild-strength strips like the Crest Whitestrips Sensitive White are specifically designed for people with sensitive teeth. They use a lower peroxide dose so the enamel is less stressed during treatment. Results typically last about 6 months and the treatment runs for 14 days at 30 minutes per day.
Medium Strength (10% H2O2)
Medium-strength strips represent the most popular category. The Crest Whitestrips Glamorous White uses a 14-day course at 30 minutes daily and whitens teeth up to 8 shades. For deeper results, the Crest Whitestrips Professional Effects Advanced runs for 20 days at 45 minutes and can achieve up to 28 shades whiter.
High Strength (14% H2O2)
The Crest Whitestrips Supreme is the strongest variant available, containing 14% hydrogen peroxide. It is recommended only when other variants do not deliver the desired result. This variant is not suitable for people with sensitive teeth and should not be used for the full 21-day course in one go.
Crest Whitestrips Strength Comparison
| Variant | Approx. H2O2 | Duration | Daily Use | Shades Whiter | Best For |
|---|---|---|---|---|---|
| Sensitive White | ~6% | 14 days | 30 min | Up to 5 | Sensitive teeth / beginners |
| Vivid White | ~10% | 10 days | 30 min | Up to 8 | Quick refresh |
| Glamorous White | ~10% | 14 days | 30 min | Up to 8 | First-time users wanting visible results |
| Professional Effects Advanced | ~10% | 20 days | 45 min | Up to 28 | Deep staining from coffee or smoking |
| Supreme Bright | ~12% | 21 days | 60 min | Professional-level | Intensive clinic-grade results at home |
| Supreme | ~14% | Up to 21 days | 30 min (1-2x) | Maximum | Stubborn stains only |
| Professional White + LED | ~10% | 19 days | 60 min | Advanced | Tech-forward users wanting boosted results |
Sensitivity and Your Teeth
Tooth sensitivity is the most important factor when choosing a whitening strip strength. Mild, temporary sensitivity during a whitening course is normal and typically fades within hours. If you experience significant discomfort, pause the treatment for 2 to 3 days before resuming.
Using a toothpaste formulated for sensitive teeth (such as Sensodyne) during your whitening course can reduce the chance of sensitivity. A softer toothbrush and fluoride-rich products also help protect enamel throughout the process. You can find more details on our safety and reliability page.
If you have sensitive teeth and still want to whiten, the Sensitive White variant is the safest starting point. It has an enamel-friendly composition yet still delivers noticeably whiter teeth through a gentle approach.
Step-by-Step Choosing Guide
Step 1: Assess Your Sensitivity
If you regularly experience discomfort with hot or cold drinks, start with the Sensitive White strips. If your teeth feel normal, you can safely use a medium-strength product.
Step 2: Identify Your Staining Level
Light surface stains from tea or wine respond well to the Vivid White or Glamorous White. Years of coffee drinking or smoking typically require the Professional Effects Advanced or Supreme Bright for a thorough treatment.
Step 3: Consider Your Timeline
Need results fast? The 1Hour Express delivers visible whitening within a single hour. For long-lasting results of 12 to 18 months, choose a full-course treatment like Professional Effects Advanced.
Tips for Best Results
Always brush lightly with water (no toothpaste) before applying strips. This removes surface debris without irritating the gums. Apply strips before bedtime rather than in the morning to minimize any sensitivity during the day.
Do not exceed the recommended treatment length. Over-bleaching does not make teeth whiter and can stress your enamel unnecessarily. Wait at least 6 months between whitening courses. For daily care, consider pairing your strips with a Crest Pro-Health toothpaste to maintain results longer.
Crest Whitestrips only whiten natural teeth. They will not affect crowns, veneers, fillings, or other dental work. Consult your dentist if you have had recent dental procedures. Read our FAQ page for more common questions about usage.
Key Takeaways
- Whitening strip strength is determined by the hydrogen peroxide concentration, which ranges from about 6% to 14% across Crest Whitestrips variants.
- Sensitive teeth should start with the Sensitive White (lowest strength) to avoid discomfort.
- Medium-strength strips like Glamorous White and Professional Effects suit most first-time users.
- The Supreme variant (14% H2O2) is the strongest available and should only be used when milder strips fall short.
- Using a sensitivity toothpaste during your whitening course helps protect enamel and reduce discomfort.
- Never over-bleach; wait at least 6 months between courses for healthy teeth.
- Crest Whitestrips are approved by the ADA and backed by clinical studies confirming their safety.
Frequently Asked Questions
What strength whitening strips should a beginner use?
Beginners should start with a mild to medium strength strip. The Glamorous White is an excellent first choice as it is the only variant approved by the American Dental Association (ADA). Those with sensitive teeth should opt for the Sensitive White instead.
What is the strongest Crest Whitestrip available?
The Crest Whitestrips Supreme is the strongest variant, formulated with approximately 14% hydrogen peroxide. It is only recommended when other variants have not provided sufficient results.
Can whitening strips damage enamel?
When used as directed, Crest Whitestrips are enamel-safe. They contain the same peroxide-based ingredients that dentists use for professional bleaching. Temporary surface roughness during treatment resolves after the course is completed.
How long do whitening strip results last?
Results typically last between 6 and 18 months depending on the variant used and lifestyle factors such as coffee consumption, wine, and smoking. The Professional Effects Advanced and Supreme Bright offer the longest-lasting results.
Should I use whitening strips if I have sensitive teeth?
Yes, but choose a low-strength variant. The Crest Whitestrips Sensitive White is specially developed for people who are sensitive to bleaching agents. Pair it with a sensitivity toothpaste for the most comfortable experience.
How often can I repeat a whitening strip treatment?
It is recommended to wait at least 6 months between full whitening courses. Over-bleaching can put unnecessary pressure on your enamel without producing additional whitening.
Do whitening strips work on crowns and fillings?
No. Whitening strips only work on natural teeth. They will not change the color of crowns, veneers, fillings, or dentures. Consult your dentist before using strips if you have recent dental work.
Find Your Perfect Whitening Strip
Ready to start whitening? Browse the full range of original Crest Whitestrips in our webshop, starting from just €37.95 with free shipping to the Netherlands and Belgium. Every order ships the next business day and is backed by our satisfaction guarantee.