Denver is known for many things, but one thing you might not think about when you picture the mile high city, is bright smiles. Like many major US cities, in Denver, teeth whitening is on the rise. As bright as the snow that blankets the city every winter, sparkling smiles are cropping up in its residents in record numbers. At one time, teeth whitening was only available at the dentist. It was also expensive meaning that in many places, including Denver, teeth whitening was only done by those that could afford it. As the procedure improved, more people wanted to get it done, but teeth whitening prices still made the procedure prohibitive. Then someone got the bright idea to bring whiter teeth to the masses by manufacturing low cost over the counter teeth whitening products.