Many of us strive for whiter teeth. In fact, in the United States, we spend an estimated $1.4 billion a year on the pursuit of a brighter smile, with the average cost of in-office dental whitening ringing in at about $600 a pop. But how far would you go to get a whiter smile? For many Britons, that answer is pretty far. That’s because, according to a new study released by Sydney, Australia-based tooth whitening brand White Glo, nearly half of all Britons surveyed admitted to visiting illegal whitening treatment centers to achieve a brighter smile!