Re: Teeth whitening
yes, they work great for what they claim to do, which is whitening your teeth. but i also experienced an unpleasant side effect (which they mention in the instructions) of extreme sensitivity while the strips were in. it was ok in the beginning, but after several days it got progressively worse. basically, imagine what your teeth would feel like if, immediately after eating boiling hot soup, you drank frigid cold water: that's what it felt like when i put the strips on after like a week or so. so i stopped doing it (i was like half way through with the box, i still have the other half in the bathroom somewhere).
but they still worked great (whitened my teeth), and the sensitivity issues were only while i had the strips on, i.e. i am totally fine now.
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