Tooth whitening is a process of lightening or bleaching the discolorations of your teeth. This can be caused by medications, systemic illness and aging. The consumption of some beverages such as coffee, tea and colas as well as the use of tobacco products can also contribute to discoloration within your teeth. The main active ingredient of the product we use is carbamide peroxide, which releases oxygen into the dentin and enamel, lightening the discolorations in your teeth.