Expertwhite Teeth Whitening Guide

Everything you need to understand at-home teeth whitening — in one place.

Expertwhite has specialized in at-home teeth whitening since 2003. Explore our guides to whitening strips, hydrogen peroxide, carbamide peroxide gels, prefilled whitening trays, whitening pens, LED kits, aligner and retainer care, and everyday whitening routines.

Whether you're comparing whitening methods, researching peroxide formulas or deciding which format fits your routine, use this guide to find the answers you're looking for.

Explore Expertwhite At-Home Teeth Whitening

Your Guide to At-Home Teeth Whitening

Section 1: Whitening Basics

Start here to understand teeth whitening, everyday staining and the questions people commonly ask before choosing an at-home whitening routine.

Tea, coffee, red wine and other everyday habits can affect the appearance of your smile over time. These guides explain why teeth can change in appearance, how whitening works and what to consider before getting started.

• Why Do Teeth Turn Yellow Even If You Brush?

• How Can I Whiten Yellow Teeth Fast?

• How to Get White Teeth Without Sensitivity

• Is Teeth Whitening Safe and Will It Damage My Enamel?

• What Causes Tooth Discoloration and Which Stains Respond to Whitening?

Explore Expertwhite Teeth Whitening Products

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Section 2: Whitening Methods Explained

Whitening strips, gels, pens, trays or LED kits? Compare the different ways to whiten at home.

At-home teeth whitening comes in several formats, and there isn't one format that's automatically right for everyone.

Some people prefer ready-to-apply whitening strips. Others like prefilled whitening trays, whitening gel used with compatible trays, a brush-tip whitening pen or an LED whitening routine.

These guides explain the differences so you can choose according to your preferred application method, formula and routine.

• Which Type of Whitening Works Best: Gel, Strips, Pen, LED, or Trays?

• What’s the Most Effective Teeth Whitening Treatment?

• What’s the Best Product to Whiten Teeth at Home?

• Do LED Teeth Whitening Kits Really Work?

• What Teeth Whitening Products Do Dentists Recommend?

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Section 3: Teeth Whitening Gels & Trays

Understand carbamide peroxide whitening gel, gel concentrations and whitening tray routines.

Carbamide peroxide whitening gel is one of the core formats in the Expertwhite collection.

Expertwhite offers whitening gels in different concentrations for use with compatible whitening trays. Choosing between them comes down to factors such as concentration, recommended wear time and the type of whitening routine you prefer.

If you're trying to understand percentages such as 16%, 22%, 35% or 44% carbamide peroxide—or comparing hydrogen peroxide with carbamide peroxide—start with these guides.

• What Strength Whitening Gel Do Dentists Use?

• Best Whitening Gel for Sensitive Teeth

• Hydrogen Peroxide vs Carbamide Peroxide — Which Whitens Better?

• What’s the Best Whitening Gel to Use with Invisalign Trays?

• Can I Whiten My Teeth While Wearing Invisalign?

Featured Product: Expertwhite™ 35% Carbamide Peroxide Whitening Gel →

Expertwhite™ Carbamide Peroxide Whitening Gel for Compatible Whitening Trays

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Section 4: Whitening Foam & Retainer Care

Make clear aligner and retainer care part of your everyday routine.

Clear aligners and retainers create their own daily-care routine. Expertwhite ALIGNFRESH™ Foam provides a convenient foam format for aligner and retainer care while fitting naturally into an Expertwhite whitening routine.

Learn more about caring for retainers and maintaining your smile while wearing removable appliances.

• How to Clean Retainers and Whiten Teeth at the Same Time

Featured Product: Expertwhite™ ALIGNFRESH™ Aligner & Retainer Cleaning Foam →

Expertwhite™ ALIGNFRESH™ Aligner & Retainer Cleaning Foam

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Section 5: Whitening Pens & Quick Touch-Ups

Portable teeth whitening for a simple brush-on routine.

A whitening pen offers a different experience from strips or trays. Instead of placing a whitening product over a larger area, a brush-tip applicator lets you apply whitening gel directly to the front surface of the teeth.

Its compact format also makes a whitening pen easy to keep with your everyday beauty essentials.

Explore the guides below if you're comparing whitening pens with other at-home whitening options or wondering how a whitening pen works.

• Do Teeth Whitening Pens Work?

• Best Teeth Whitening Pen 2025

Featured Product: Expertwhite™ 35% Carbamide Peroxide Whitening Pen →

Expertwhite™ 35% Carbamide Peroxide Whitening Pen with Brush-Tip Applicator

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Section 6: Teeth Whitening Strips

Answers to the most common questions about whitening strips, peroxide, wear time, staining and everyday use.

Whitening strips are one of the simplest ways to add teeth whitening to an at-home beauty routine.

Expertwhite™ Teeth Whitening Strips use hydrogen peroxide with StayPut™ Technology in an ultra-thin strip designed for secure 30-minute wear. Each pack contains 28 strips for 14 whitening treatments.

If you're researching whether whitening strips work, how often to use them, how they handle everyday staining or what to look for when choosing strips, explore the guides below.

• Which Whitening Strips Actually Work?

• Do Whitening Strips Work on Yellow Teeth?

• Can I Use Whitening Strips Every Day?

• Do Whitening Strips Cause Sensitivity?

• Do Whitening Strips Cause White Spots?

• Can Whitening Strips Damage My Teeth or Gums?

• How Do I Make Whitening Strip Results Last Longer?

• Why Don’t Whitening Strips Work for Me?

• Do Whitening Strips Remove Coffee or Wine Stains?

Featured Product: Expertwhite™ Hydrogen Peroxide Teeth Whitening Strips →

Expertwhite™ Teeth Whitening Strips with StayPut™ Technology

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Section 7: LED Teeth Whitening Kits

Explore how LED whitening fits into an at-home teeth-whitening routine.

LED teeth whitening kits combine a whitening formula with an LED mouthpiece or tray.

If you're deciding whether an LED kit is the right format for you, start by understanding what the whitening formula does, what role the LED component plays and how an LED routine compares with strips, pens and whitening trays.

• Do LED Teeth Whitening Kits Really Work?

• How Long Does It Take to Whiten Teeth?

Featured Product: Expertwhite™ LED Teeth Whitening Kit →

Expertwhite™ LED Teeth Whitening Kit for At-Home Whitening

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Section 8: Whitening Use, Sensitivity & Maintenance

Understand whitening frequency, sensitivity and how to maintain your preferred smile.

Questions about frequency and sensitivity are common when researching teeth whitening.

The right routine depends on the whitening format you're using, its ingredients and concentration, and the directions for that particular product. More product or longer wear is not automatically better.

These guides answer common questions about whitening frequency, temporary sensitivity, white spots and maintaining your whitening routine over time.

• Can I Whiten My Teeth Every Day?

• How to Get White Teeth Without Sensitivity

• What Causes White Spots After Whitening?

• How to Make Whitening Results Last Longer

Featured Product: Expertwhite™ After-Whitening Gel →

Expertwhite™ After-Whitening Gel — The Finishing Touch to Your Whitening Routine

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Section 9: The Expertwhite Philosophy

At-Home Teeth Whitening Since 2003

Expertwhite was founded in California in 2003 with a simple idea: make teeth whitening easier to fit into real life.

More than 20 years later, at-home teeth whitening is still our focus.

Today, the Expertwhite collection includes hydrogen peroxide whitening strips, carbamide peroxide whitening gels, prefilled teeth whitening trays, whitening pens, LED whitening kits, whitening Booster Gel and aligner and retainer care.

Different products. Different routines. One Expertwhite philosophy:

Whiten your way. Smile your way. Pass it on.

Because for us, whitening has always been about the smile that comes afterward.

Shop the Full Expertwhite Collection →

Section 10: Teeth Whitening Booster Gel

Add whitening to the brushing routine you already have.

A teeth whitening Booster Gel is different from whitening toothpaste and traditional whitening gel used with trays.

Expertwhite™ THE BOOSTER GEL™ is a 35% carbamide peroxide whitening gel designed to be used alongside your regular toothpaste. Add one pump when you brush, then brush and rinse as directed.

There are no whitening strips or trays to apply and no separate whitening session, making Booster Gel an easy option for people who want to incorporate whitening into their existing brushing routine.

Learn About Whitening Booster Gel

• What Is a Teeth Whitening Booster Gel? How Does It Work?

• Whitening Toothpaste vs. Whitening Booster Gel: What’s the Difference?

• Do Teeth Whitening Booster Gels Work?

• Whitening Strips vs. Whitening Booster Gel: Which Should You Choose?

Featured Product: Expertwhite™ 35% Carbamide Peroxide Whitening Booster Gel →

Shop Expertwhite™ THE BOOSTER GEL™ — Whiten While You Brush

• What Is a Teeth Whitening Booster Gel? How Does It Work?

• Whitening Toothpaste vs. Whitening Booster Gel: What’s the Difference?

• Do Teeth Whitening Booster Gels Work?

• Whitening Strips vs. Whitening Booster Gel: Which Should You Choose?

Featured Product: Expertwhite™ 35% Carbamide Peroxide Whitening Booster Gel

One pump alongside your toothpaste. Brush. Rinse. Done.

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