Does Over The Counter Teeth Whitening Work?

Depending on the condition of your teeth they can be effective. However, the ingredients in over-the-counter products aren’t very concentrated meaning that they have very low concentrations of active bleaching ingredients, so it may take several weeks for you to see any measurable results.

Some over-the-counter kits contain mouthpieces or teeth whitening trays that aren't custom-fitted to your teeth, that is, they do not fit snugly around your teeth and this can result in uneven bleaching and possibly gum irritation.