Whitening strips are one of the most popular at-home teeth whitening solutions, but picking the wrong strength can mean disappointing results or unnecessary sensitivity. The key variable is the concentration of hydrogen peroxide in the gel, which ranges from about 6% to 14% across the Crest Whitestrips lineup. Choosing correctly depends on your current level of discolouration, tooth sensitivity, and whitening goals. In this guide, we walk you through every factor so you can confidently select the strip that matches your smile.
How Whitening Strips Work
Whitening strips are thin, flexible pieces of polyethylene coated with a hydrogen peroxide gel. When placed on your teeth, the peroxide penetrates the enamel and breaks down discoloured compounds called chromogens, making your teeth appear lighter. According to the American Dental Association, bleaching compounds in over-the-counter whitening products are peroxide-based and work by breaking stains into smaller pieces.
Hydrogen peroxide is the active bleaching ingredient in every Crest Whitestrips variant. The concentration of that peroxide, combined with the recommended wear time and treatment duration, determines the overall "strength" of the product.
Understanding Strength Levels
Strength level is a shorthand for how much hydrogen peroxide the strip contains and how long you wear it. A higher percentage does not automatically mean "better." It means more aggressive stain removal, which also raises the chance of temporary sensitivity.
Mild Strength (6-10% H2O2)
Mild-strength strips suit first-time users and people with light surface staining. The Crest Whitestrips Vivid White is a standard 10-day treatment with a mild formula, ideal for a quick refresh or for those who only want to go a few shades lighter. Similarly, the Crest Whitestrips Glamorous White uses a mild-strength gel over 14 days and is the only variant approved by the ADA (American Dental Association).
Medium Strength (10% H2O2)
The Crest Whitestrips Professional Effects contains a 10% hydrogen peroxide formula and delivers up to 18 shades whiter in 20 days. It is the most popular choice for people with years of coffee, wine, or tobacco staining.
High Strength (14% H2O2)
The Crest Whitestrips Supreme is the strongest variant Crest has released, formulated with 14% hydrogen peroxide. It is recommended only when other variants have not delivered the desired result and is not suitable for people with sensitive teeth.
Crest Whitestrips Comparison Table
| Variant | Strength | Duration | Wear Time | Shades Whiter | Best For |
|---|---|---|---|---|---|
| Sensitive White | Low | 14 days | 30 min/day | Subtle | Sensitive teeth & beginners |
| Vivid White | Mild | 10 days | 30 min/day | Up to 5 | Quick refresh |
| Glamorous White | Mild | 14 days | 30 min/day | Up to 8 | First-time whiteners |
| 1 Hour Express | Medium | 10 days | 60 min/day | Up to 12 | Last-minute events |
| Professional Effects | Medium | 20 days | 45 min/day | Up to 18 | Heavy coffee/wine stains |
| Supreme Bright | Strong | 21 days | 60 min/day | Up to 24 | Deep, stubborn discolouration |
| Supreme | Strongest | 10-21 days | 30 min/day | Maximum | Only if other strips fail |
| Professional White + LED | Strong + LED | 19 days | 60 min/day | Up to 24+ | Maximum result & longevity |
Tooth Sensitivity and Safety
Tooth sensitivity is the most commonly reported side effect of whitening strips. A study published in the National Library of Medicine found that 43% to 80% of patients experience temporary sensitivity after peroxide-based whitening. Choosing a lower-strength strip significantly reduces this risk.
If you know your teeth are sensitive, start with the Crest Whitestrips Sensitive White, which is specifically formulated with a gentler composition that puts less stress on enamel during bleaching. The ADA recommends using only products that carry its Seal of Acceptance and following the manufacturer's usage instructions exactly.
Step-by-Step: Choosing Your Strength
1. Assess Your Discolouration
Light surface stains from tea or ageing respond well to mild strips like Glamorous White. Deep yellow or brown stains built up over many years of coffee, red wine, or tobacco use call for a medium or strong option such as Professional Effects or Supreme Bright.
2. Factor In Sensitivity
If you have ever experienced discomfort from cold drinks or whitening toothpaste, opt for the Sensitive White variant first. You can always move up in strength later.
3. Consider Your Timeline
Need results before a wedding this weekend? The 1 Hour Express shows visible improvement within a single session. For a thorough, lasting transformation, the 20-day Professional Effects course or 21-day Supreme Bright course is the better investment.
Maintaining Your Results
Whitening results are never permanent. According to the Whitestrips-shop.nl FAQ, results typically last 12 to 20 months depending on lifestyle factors such as coffee, wine, and tobacco use. You can extend your results by using a whitening toothpaste or mouthwash between treatments.
Many users do a full-strength course once a year and touch up with a milder strip (like Vivid White) midway through. Reading real customer reviews can help you see what maintenance routine works for others.
Key Takeaways
- Hydrogen peroxide concentration is the main factor that determines strip strength, ranging from about 6% to 14% across the Crest lineup.
- Mild strips (Glamorous White, Vivid White) are perfect for beginners and light staining.
- Professional Effects (10% H2O2, 20 days) is the most popular choice for moderate to heavy discolouration.
- Supreme and Supreme Bright are reserved for stubborn stains that milder strips could not remove.
- Sensitive White is specifically designed for users prone to tooth sensitivity.
- Always follow the recommended wear time; overuse can harm enamel without making teeth whiter.
- Results last 12 to 20 months on average; touch-up treatments help maintain brightness.
Frequently Asked Questions
What is hydrogen peroxide and why is it in whitening strips?
Hydrogen peroxide is a bleaching agent that penetrates tooth enamel and breaks down stain-causing molecules. It is the active ingredient in virtually all Crest Whitestrips products and the same compound dentists use for professional bleaching.
Can I use the strongest strip right away?
It is not recommended. The Crest Whitestrips Supreme is only advised when other variants have not delivered the desired result. Starting with a milder option reduces the risk of sensitivity and still produces excellent results for most people.
How long do whitening strip results last?
Depending on your habits, results typically remain visible for 12 to 20 months. Avoiding heavily pigmented foods and beverages and using a whitening toothpaste can extend this duration.
Are whitening strips safe for my enamel?
Yes, when used as directed. The ADA notes that products bearing its Seal of Acceptance have been evaluated for safety and effectiveness. Crest Whitestrips Glamorous White is the only strip variant that currently holds ADA approval.
What if I have sensitive teeth?
Choose the Crest Whitestrips Sensitive White. These strips use a gentler formula and put less stress on your enamel during the treatment cycle.
How do I know if my stains are mild or severe?
If a standard whitening toothpaste produces a noticeable difference, your stains are likely mild. If you have been drinking coffee or smoking for over a decade with no improvement from toothpaste alone, you likely need a medium or strong strip.
Can I combine strips with LED whitening?
Yes. The Crest Whitestrips Professional White + LED kit includes an LED accelerator light that enhances the bleaching process, with effects that can last up to 3 years or longer.
Where can I buy original Crest Whitestrips in the Netherlands?
You can order authentic, US-imported Crest Whitestrips at Whitestrips-shop.nl starting from just €37.95, with free shipping in the Netherlands and Belgium.
Find Your Perfect Whitening Strip
Ready to pick the right strength? Browse the full range of original Crest Whitestrips at Whitestrips-shop.nl. Every order ships free, arrives the next business day, and is backed by a satisfaction guarantee. Start your journey to a brighter smile today.