The crest professional effects, available from The White Smiles, allow you to get a dentist approved way to obtain an extremely whiter smile- right at home! They are made with the same hydrogen peroxide that the professionals use, are enamel safe, and clinically-proven to remove up to 14 years of stains from coffee, tea, wine, and smoking! Follow this link https://thewhitesmiles.com/sho....p/crest-whitening-st