They promise a perfect smile at a fraction of the price of professional treatments.
But cheap tooth-whitening methods and DIY remedies can do permanent damage, a dentist warns.
Some are so harsh they strip away the enamel, leaving healthy young people with dull brown teeth usually only seen in the elderly.
***If you are a news addict, be sure to bookmark The Most Important News and visit on a daily basis for the very best breaking news, articles and videos from all over the Internet!***