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^Thats the rumor, anyway...Ive never looked too much into it to know for sure.
Ive tried the strips a few times...they definately work, however, if you have sensitive teeth, they can really really hurt sometimes. There was once when I actually yelled from the sudden sharp pain and ripped the things from my mouth. Even after they were gone my teeth felt like they were getting burned with a hot iron.
Ive also tried the brush on paste crap...doenst do squat and is a pain in the ass.
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