Colgate Sensitive Prevent and Repair toothpaste is a clinically proven formula that works fast, within 2 weeks, and provides long-lasting sensitivity relief and builds a protective shield to help prevent painful sensitivity with regular use. This sensitive toothpaste contains an advanced dual-action formula that helps prevent painful sensitivity and helps repair weakened parts of sensitive teeth. Plus Colgate Sensitive Prevent and Repair toothpaste helps strengthen enamel with fluoride, whiten teeth, defend against cavities and provides the freshness you trust from Colgate.