ANSWERS: 1
  • Crest Whitestrips include: Classic, said to whiten in 14 days; Premium, said to whiten in three days; Proeffects, which promise professional-like results in 10 days; Advanced Seal, said to offer a firm grip on your teeth while whitening in 14 days; Daily Whitening Multicare, used five minutes a day to whiten; and Daily Whitening Plus Tarter Protection, also used five minutes a day.

    Source:

    Crest Whitestrips

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