Whitening strips come in a range of strengths, and picking the wrong one can mean underwhelming results or unnecessary tooth sensitivity. The active ingredient in every Crest Whitestrips product is hydrogen peroxide, but concentrations vary from roughly 6% to 14%. Your ideal strength depends on factors like current discolouration level, tooth sensitivity, and how quickly you want visible results. In this guide we break down each strength tier, compare the most popular Crest Whitestrips variants side by side, and help you confidently choose the product that matches your smile goals.
How Whitening Strips Work
Whitening strips are thin, flexible pieces of polyethylene coated on one side with a hydrogen peroxide gel. When pressed against your teeth, the peroxide penetrates enamel and dentin, breaking down discoloured chromophore molecules into smaller, colourless compounds. The result is a visibly lighter tooth shade.
Hydrogen peroxide is the same bleaching agent dentists use in professional treatments. The difference lies in concentration and application time. Over-the-counter strips typically contain between 6% and 14% hydrogen peroxide, while in-office treatments may go higher. Choosing the right percentage is therefore the single most important decision you will make when shopping for whitening strips.
Understanding Strength Tiers
Mild Strength (6-9% H₂O₂)
Mild-strength strips are designed for light touch-ups or for people who are new to teeth whitening. Crest Whitestrips Vivid White is a 10-day treatment with a mild formula, ideal for anyone who simply wants their teeth a few shades lighter. The Crest Whitestrips Sensitive White variant also falls in this category, using a gentler composition that is less taxing on enamel.
Medium Strength (10% H₂O₂)
Medium-strength strips are the most popular choice. Crest Whitestrips Glamorous White is the only variant approved by the American Dental Association (ADA), offering a 14-day treatment that can make teeth up to 25 times whiter than whitening toothpaste alone. Crest Whitestrips Professional Effects also uses 10% hydrogen peroxide and delivers up to 18 shades whiter in 20 days.
High Strength (14% H₂O₂)
High-strength strips are reserved for stubborn, deep-set discolouration. Crest Whitestrips Supreme is the strongest variant Crest has ever released. It should only be used when milder products have not delivered satisfactory results, and it is not recommended for people with sensitive teeth.
Crest Whitestrips Comparison Table
| Variant | Strength | Treatment Duration | Daily Wear Time | Shades Whiter | Best For |
|---|---|---|---|---|---|
| Sensitive White | Mild | 14 days | 30 min | Gradual | Sensitive teeth, beginners |
| Vivid White | Mild | 10 days | 30 min | A few shades | Quick touch-ups |
| Glamorous White | Medium (ADA-approved) | 14 days | 30 min | Up to 8 | First-time users wanting noticeable results |
| Professional Effects | Medium (10% H₂O₂) | 20 days | 45 min | Up to 18 | Deep cleaning of coffee/wine/tobacco stains |
| Supreme Bright | Strong | 21 days | 60 min | Up to 24 | Maximum whitening, comparable to laser treatments |
| Supreme | Strongest (14% H₂O₂) | Use until result | 30 min (1-2×/day) | Maximum | Stubborn stains when other variants fail |
| Professional White + LED | Advanced + LED light | 19 days | 60 min | Professional-grade | Latest technology enthusiasts |
What if You Have Sensitive Teeth?
Tooth sensitivity is the most common side effect of whitening strips. Sensitivity is a temporary condition where teeth react to temperature changes or pressure during and shortly after a bleaching cycle. If you already experience sensitivity day to day, start with the Sensitive White variant, which uses a lower peroxide concentration and an enamel-friendly formulation.
Using strips at night instead of in the morning can also reduce discomfort. Pairing your treatment with a fluoride toothpaste beforehand helps reinforce enamel before peroxide exposure. If sensitivity persists after a few days, skip a day and resume. Never jump straight to a high-strength strip if you know your teeth are prone to sensitivity.
Key Factors for Choosing Your Strength
1. Level of Discolouration
Light yellowing from ageing or tea? A mild strip is sufficient. Years of coffee, red wine, or tobacco use call for a medium-strength product like Professional Effects. Only when those have not worked should you consider Supreme or Supreme Bright.
2. Previous Whitening Experience
If you have never bleached before, start with Glamorous White or Vivid White. Jumping to a 14% product on your first try increases the risk of gum irritation and sensitivity with little extra benefit in the short term.
3. Timeline
Need results before a wedding this weekend? The 1Hour Express strips deliver visible improvement within a single hour. For a longer-lasting transformation, the 20-day Professional Effects or 21-day Supreme Bright treatments produce results that can remain visible for 12 to 18 months.
Tips for the Best Results
Regardless of the strength you pick, a few habits will maximise your outcome. First, do not brush your teeth immediately before applying strips; brushing can temporarily open enamel pores and increase sensitivity. Second, follow the recommended daily wear time exactly. Overuse does not make teeth whiter and may stress enamel.
Third, consider complementary products. A quality whitening toothpaste or mouthwash between treatments helps maintain your new shade. Finally, always buy original Crest Whitestrips imported from the United States. Cheaper imitations imported from other regions often contain inconsistent peroxide levels and lack the Advanced Seal technology that keeps strips firmly in place.
Key Takeaways
- Whitening strip strength is determined by hydrogen peroxide concentration, ranging from about 6% to 14%.
- Beginners and people with sensitive teeth should start with a mild variant like Sensitive White or Vivid White.
- Medium-strength strips (10% H₂O₂), such as Professional Effects and Glamorous White, suit most users.
- Glamorous White is the only Crest Whitestrips variant approved by the American Dental Association.
- Supreme (14% H₂O₂) is the strongest option and should be a last resort for stubborn stains.
- Application time matters as much as peroxide percentage; always follow the recommended schedule.
- Buying original US-manufactured strips ensures consistent quality and safe peroxide levels.
Frequently Asked Questions
What is the strongest Crest Whitestrips variant?
Crest Whitestrips Supreme is the strongest variant available, formulated with 14% hydrogen peroxide. It is intended for stubborn discolouration that milder products cannot address and is not recommended for sensitive teeth.
Are whitening strips safe for enamel?
Yes, when used as directed. Hydrogen peroxide-based strips have been studied extensively and are considered enamel-safe at concentrations up to 10%. Higher concentrations should be used cautiously and never beyond the recommended treatment period.
How long do whitening strip results last?
Results vary by product. Mild strips like 1Hour Express last roughly 6 to 9 months. Medium-strength treatments such as Professional Effects remain visible for at least 12 months. Supreme Bright results can stay for up to 18 months or longer.
Can I use whitening strips if I have sensitive teeth?
Yes. Choose the Sensitive White variant, which has a lower peroxide concentration and an enamel-friendly formulation. Apply strips at night and use fluoride toothpaste before treatment to minimise discomfort.
How often can I repeat a whitening strip treatment?
Most Crest Whitestrips treatments can be repeated once or twice a year. For the Professional White + LED kit, Crest recommends a maximum of two kits per year to protect enamel health.
What is the difference between Glamorous White and Professional Effects?
Both use a similar peroxide concentration, but Professional Effects is a longer 20-day treatment with 45-minute daily wear, targeting deeper stains and achieving up to 18 shades whiter. Glamorous White is a 14-day, 30-minute treatment that achieves up to 8 shades whiter and carries ADA approval.
Do I need to see a dentist before using whitening strips?
It is generally advisable to have a dental check-up before beginning any bleaching treatment. Cavities or gum disease should be treated first, as peroxide can cause pain and complications on damaged teeth.
Find Your Perfect Whitening Strength Today
Ready to start your whitening journey? Browse the full range of original Crest Whitestrips at Whitestrips-shop.nl, with prices starting at just €37.95, free shipping in the Netherlands and Belgium, and a satisfaction guarantee. Pick the strength that matches your smile goals and enjoy results you can see in as little as three days.