There are a number of things that can cause your teeth could be whiter. People who drink a lot of coffee and tea, or who smoke a lot, find that they have developed stains and discoloration on their teeth.
Make sure that your teeth are clean. It is the first step to obtaining beautiful white teeth. Teeth whitening products will work best on clean teeth, and the results will last longer if you take care of your teeth regularly. Dirty teeth will present obstacles to the whitener, and you will end up with uneven shades of white and yellow on your teeth. Brushing your teeth and flossing thoroughly will prevent this from happening.
You shouldn’t whiten your teeth if you have untreated cavities … Read the rest