Whitening your teeth can significantly improve the appearance of your smile, for relatively little effort. That said, it's important to note that, when whitening your teeth, less is more!
When people over-whiten their teeth the result can be quite jarring and unnatural looking. Brilliantly white teeth are not attractive, and can look a little weird in person.
With the exception of people who have a career in television, or modelling, it’s always better to err on the side of caution. Over-doing teeth whitening could actually result in making your smile less attractive!
Whitening your teeth more often than recommended could also lead to unexpected dental health problems such as softening your enamel, making your teeth extra sensitive, and in extreme cases, it could even cause your teeth to become a strange, blue-grey colour.
That said, teeth whitening is very safe. It takes a lot to over-whiten your teeth and to reach the the point where you wind up with oral health problems. Just be sure to exercise caution.