Whats the best generic teeth whitening kit to buy at a store like walgreens or cvs?

Bleaching teeth: Crest white strips can work, though they only cover the front 6 teeth, so if there is a big color change, it may be very noticeable compared to the back teeth. Avoid using any product that requires a "pre rinse" as this is usually acidic and can destroy tooth structure as well as make them more sensitive.

See dentist: I would not waste time with store bought products. For optimum results see your dentist. The percentage of peroxide is not the same and the delivery system is not the same. You need a custom tray that only fits your mouth not a stock moldable tray or strips which do not adhere properly and only cover anterior teeth. In addition, the dentist will evaluate your teeth prior to the procedure .