how long does it take for teeth whitening toothpaste to show results?
i have Rembrandt (i think that’s the name) intense stain tooth paste, i use that every night then regular crest in the morning/after meals, how long does it take to show noticeable results. also, which teeth whitening toothpaste is the best? is it okay to use two different kinds at the same time (say arm and hammer toothpaste and rembrandt)
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