Are Whitening Strips and Trays Safe? Here’s What You Should Know
Our client saying goodbye to whitening strips
Teeth whitening is one of the most requested cosmetic treatments in Canada. Over-the-counter whitening strips and trays are popular because they seem quick and convenient. But the question remains: Are whitening strips and trays safe for your teeth?
The short answer: they can be safe when used properly—but they’re not risk-free. Understanding how these products work and their limitations will help you make the best choice for a brighter, healthier smile.
How Whitening Strips and Trays Work
Over-the-counter whitening products typically use peroxide-based gels—hydrogen or carbamide peroxide—to break down stains on the surface of your teeth.
Whitening Strips: Thin, gel-coated strips that stick to the front of your teeth for 20–60 minutes.
Whitening Trays: Plastic trays filled with whitening gel that fit over your teeth. Drugstore trays are usually “one-size-fits-all,” while dentist-provided trays are custom molded for better coverage.
While these products can lighten surface stains caused by coffee, tea, wine, and aging, they often provide uneven results and come with some risks.
Potential Risks of Strips and Trays
Most Canadian over-the-counter whitening products are considered safe when used as directed, but misuse or overuse can lead to:
Tooth Sensitivity – A temporary sharp discomfort, often triggered by cold or sweet foods.
Gum Irritation – Whitening gel can leak from strips or trays and irritate your gums.
Uneven Whitening – Especially with strips, which don’t always reach the edges or between teeth.
In some cases, people with existing cavities, gum disease, or exposed roots may experience more severe discomfort or damage.
Why Many People Choose Professional Whitening
If you want a safer, more predictable result, professional whitening is your best option. Our clinic uses hand-applied whitening treatments, meaning:
No messy trays or slipping strips
Even coverage on every visible tooth
Lower risk of sensitivity or gum irritation
Faster results under dentist supervision
With hand-applied whitening, your teeth are protected, and your gums are carefully avoided, making it much safer than DIY products.
The Bottom Line
Whitening strips and trays are generally safe in Canada when used as directed.
They can cause temporary sensitivity, gum irritation, and uneven results.
Hand-applied professional whitening offers the safest, most effective, and fastest results.
If you’re looking for a brighter smile without the risks of at-home strips and trays, book a professional whitening session with our team. We’ll ensure a radiant result—safely and comfortably.
Ready to boost your confidence with a brighter smile? Contact Grin Whitening Clinic, Calgary’s best teeth whitening clinic, today!
📞 Call: 403-404-8352