supposed to be in for 1/2 hour? Will it dissolve? Eat away at the teeth? Whiten more?
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Over the counter teeth whitening systems are rather mild concentrations. Reason is - they can't be directed only on the teeth because they do not custom fit your own teeth. The solution goes everywhere in your mouth. Within a certain time, the solution becomes diluted with saliva and becomes ineffective. It won't hurt you...you will probably swallow some of it, but because it isn't as strong as the stuff the dentist gives you, you won't drop dead. The solution will whiten for the time it says it will. Wearing strips (or other delivery systems) longer than directed won't do you any good. It won't hurt, but it won't help either.
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