I write this review with a set of teeth as white as my the background of this website. I had gotten my teeth whitened before at a spa, and the results lasted maybe a few weeks before wearing off. I had gotten my teeth whitened by Dr. Chu and it was over 3 months ago and they are still as white as the first day. I am impressed with how long it has lasted, and I will always go to Dr. Chu for my teeth whitening from now on.
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