One thought on “How many whitening kits can you use?

  1. Arti says:

    Crest® suggests that it’s permissible to use as many as two boxes of their whitening strips per year, although this recommendation varies according to exactly which Whitestrips® product is used. Yes, with Whitestrips® “twice a day permitted” products it’s permissible to perform one treatment immediately after the other.

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