Crest 3DWhite Daily Whitening Serum Overnight Freshness is a teeth whitening product that can be used at night. It effectively removes stains from the surface of the tooth and has minimal sensitivity. The serum has 15x more whitening power than toothpaste and is safe for nightly use without rinsing or brushing required. Results show whiter teeth in just 4 days of use. (This content is generated by AI)