Teeth whitening is a cosmetic dental procedure aimed at lightening the color of a person’s teeth. It helps to remove stains and discoloration, giving the teeth a brighter and more attractive appearance. Teeth whitening is most effective on surface stains caused by food, drinks (like coffee and tea), tobacco, and aging. It may not be effective on intrinsic stains, such as those caused by trauma, certain medications, or excessive fluoride. The longevity of the results can vary depending on a person’s oral hygiene, diet, and lifestyle habits.