In today's image conscious society an increasing number of people are following the example of Tom Cruise, Catherine Zeta-Jones, Victoria Beckham, Nicole Kidman and a host of other celebrities and adding a bright white smile to their shopping list. But, with so many tooth whitening treatments available today, how do you go about picking the method that is best for you?

The tooth whitening industry is growing at an alarming rate and now represents a $2 billion dollar a year business in the US with companies falling over themselves to introduce new products almost on a daily basis and investing millions in advertising. Everywhere you look you see offers for the latest, fastest, most effective and cheapest new product, so how do you set about making your choice?

Before you choose any treatment at all it is important to understand that tooth whitening works