yes they work great and whitening your teeth is easy and fast
You can buy any strength gel nite white 10 percent 10% is the weakest and you buy the do it yourself bleach trays from them at
http://www.crestwhitestripsnow.co.uk and comes with full instructions for you to do all the whitening at home using carbamide peroxide or hydrogen peroxide which is what dentist professionals use and charge 4 times more!
http://www.crestwhitestripsnow.co.uk does free shipping and they also carry a full line of crest products, toothpastes, zoom whitening , pola night and pola day products, cheapest online source you will find with the top whitening gels and best tooth whitening products made and used by the top dentist
Source(s):
http://www.crestwhitestripsnow.co.uk
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