Whitening is fine for any teen or adult with healthy teeth. However, existing dental work — such as porcelain veneers, crowns, or tooth colored bonding — won’t change color. Any visible restorations will remain the same shade as they were before. If you’re planning to have them updated, it’s best to do so after you’ve whitened, so that their shade can be matched to the new color of your teeth. For this reason, we frequently recommend whitening before undergoing other cosmetic treatments.