Most products I have taken in the past usually only work for a few days. I tried your product a few months ago and my teeth are still white and they haven't lost there brightness
I brush my teeth twice a day with all these teeth whitening tooth pastes & trays that are suppose to make your teeth whiter but they have never ever given me results. After a few days of using your simple to use product my teeth were whiter and you made me so happy. You guys are the best.
Shelly, United Kingdom