Did anybody try them? can you give me a good recomendation which to try? Did you actualy see any change in color?
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I used two whole boxes of crest whitestrips advanced seal in one month, and I did see a difference of about 5-8 shades. my teeth were pretty bad off because I had neglected to brush them as a child. they aren't as white as I'd like them to be, more of an off-white, but I have braces right now so it doesn't matter too much. but they are definitely a heck of a lot brighter than they used to be. I used them back in august, and the color is still the same, so I'd say the effects last.
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