I had never used any teeth whitening products before as my teeth are in good condition, I just wanted to brighten my smile for my upcoming wedding day. These strips are so easy to use, the pack contains 14 foil sachets which each contain thin, flexible strips that are coated with a tooth whitening gel containing hydrogen peroxide and are designed to mould to your teeth. The strips are designed to remove stain build-up below tooth enamel (apparently formulated with the same enamel-safe whitening ingredient dentists use). You apply them once a day for 30 mins for a course of 14 days. They work better if you don’t brush your teeth beforehand. I always brush my teeth afterwards to remove any excess gel left on my teeth as I’m sure if I had just left it on, the hydrogen peroxide gel would keep working and really start to get sore! There’s nothing worse than sore teeth! 
This is the description for the product:“With revolutionary Crest Whitestrips Advanced Seal, life doesn't stop just because you're whitening. Its groundbreaking adhesive formulation holds the Whitestrips in place, so you can whistle along with the radio, take a shower, and even drink water while you whiten!”
I would agree that the seal is good and the strips do stay in place for the whole 30 mins and I could chat away whilst wearing them but I don’t know about drinking water! I didn’t do that as I was worried that the gel might not be as effective if they came into contact with a lot of water in my mouth. The pack states that the results are guaranteed to last for 12 months. Here's what the strips look like...
I have just noted below some things to bear in mind if you want to try these:
Crest Whitestrips will only whiten natural teeth; they will not whiten caps, crowns, veneers, fillings, or dentures.
Crest Whitestrips should not harm most dental work.
Do not use with dental braces.
The result?
My teeth have definitely been noticeably whitened but they’re not ridiculously white…I was determined not to get the eye blindingly white look…that always looks so false. I have very sensitive teeth but amazingly I haven’t experienced any pain or discomfort from using the White Strips at all. I don’t know if that’s because I brushed my teeth directly after using them but it must have helped. So, this product has been a massive success for me and I’m REALLY pleased with the results! I will just be using a gentle whitening toothpaste up until the wedding just to keep my teeth looking nice. I will definitely be re-purchasing this product to keep my smile nice and bright!
I got mine for £23.95 from http://www.discounthealthproducts.co.uk/Crest_Whitestrips_Supreme.htm. The website states that it's a 7 day supply but the instructions on the packet say to just apply them ONCE a day.
