You can whiten your teeth several ways. One way to do it is to go to the dentist and have custom trays made and buy special bleach that they sell in the office only and you can not get it from the stores. Another way is to get whitening strips from your pharmacy.
you can buy whitening strips, different strenght availabe, the strongest ones at the dental office,you can also have in done with bleaching trays or lazor at the dentist office, depends on how much you want to spend