One thought on “How is Crest Whitestrips Supreme different from the Whitestrips sold in stores?

  1. Arti says:

    Crest Whitestrips Supreme: Crest Whitestrips Supreme: Crest Whitestrips Supreme should be worn on your upper and lower teeth for 30 minutes twice a day for 21 days. Crest Whitestrips Supreme should be worn on your upper and lower teeth for 30 minutes twice a day for 21 days.

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