Ltpgtadvanced teeth whitening strips can produce a perfect white smile the best results are achieved with a 2 week whitening course using the strips daily for 20 30 minutes our teeth whitening strips are fully certified and meet uk amp eu regulations zero peroxide that gives you whitening power without all those nasty chemicals in other whitening products ltpgt ltpgtsafe and effective whilst results vary from user to user ie what colour the teeth shade is to begin with l