Why not choose over-the-counter whiteners instead?
First of all, over-the-counter whiteners require a lot of patience. It is not legal to sell high-potency bleaching agent products, so most systems will require several applications. Secondly, the results from these products do not come close to the results that can be achieved with professional tooth whitening. “Whitening” toothpastes are targeted toward removing superficial stains and do not address intrinsic (internal) discoloration.