Think of tooth whitening as a deep clean for your enamel. Over time, things like coffee, tea, red wine, and aging create "stains" that settle deep into the microscopic pores of your teeth. Brushing alone can’t reach these because they are beneath the surface.

How does it actually work?

Whitening products use specialized "bleaching" agents—usually hydrogen peroxide or carbamide peroxide.

1. Oxygenation: When the gel touches your teeth, it breaks down into oxygen molecules.

2. Scrubbing: These molecules dive into the tiny pores of your enamel.

3. Breaking apart stains: They break up the chemical bonds of the stains, making them smaller and less concentrated.

4. The result: Once the stains are broken down, more light can scatter through the tooth, making it look much brighter and whiter.

Important Things to Know

• Sensitivity is normal: Some people feel a "zing" or temporary sensitivity to cold during treatment. This usually goes away a day or two after you stop.

• It’s not permanent: Depending on your diet (hello, coffee lovers!), you’ll likely need a "touch-up" every 6 to 12 months.

• It doesn't work on "fake" teeth: Whitening gel will not change the color of dental crowns, veneers, or fillings. If you whiten your natural teeth, your older dental work might suddenly look darker by comparison.