With whitening strips, there are ingredients such as peroxide to help whiten your teeth. Peroxide is a type of bleach that can remove the stains on your teeth and reduce the concentration of possible stains to make your teeth appear whiter. The strips are made of a thin layer of plastic covered with peroxide gel. Depending on the brand of whitening strips you are using, you are most likely to wear the strip for at least 30 minutes (once or twice) a day for two weeks.
Limit staining beverages like coffee, tea, fruit juice, and red wine.
Limit any food that is high in acidity.
Consider using a straw if you intend to drink tooth-staining beverages.
Avoid smoking cigarettes or any tobacco product.
Maintain a good oral hygiene routine
Brush your teeth after meals.
Chew sugarless gum to neutralize and balance the acid/pH levels