This begs the question “does teeth whitening damage the enamel?” The answer is no, teeth whitening doesn't damage your tooth enamel. The main portion of the tooth, the dentin, is the portion of the tooth that's responsible for your teeth's color.

Does whitening teeth cause long term damage?

Bleaching products can have multiple side effects such as damaging the dental enamel, causing irritation to the gums, tooth sensitivity and more. Some of these effects are lasting; for example the damage to the dental enamel is permanent and irreversible.

Why you should not whiten your teeth?

Agents found in teeth whitening treatment can damage the developing teeth, especially the pulp chambers, which can cause sensitivity. Some patients also find that their custom mouth-trays are uncomfortable, which is caused by the tray not aligning properly with their mouths.