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Whiten like a professional-level treatment and remove 14 years of set in stains with Crest Whitestrips Professional Effects. When used for 30 minutes a day, you’ll start seeing a whiter smile in three days. Get a noticeably whiter smile for that last-minute event in just one hour with 1 Hour Express Whitestrips. Whiten without worry. Crest Whitestrips use the same enamel-safe whitening ingredient that dentists use, and are a safe and effective way to enhance your smile at home. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.







