Crest Pro-Health Maximum Cavity Protection stops cavities before they start, providing up to 12 hours of protection with its antibacterial fluoride formula, while most toothpastes quit working in minutes. Crest Pro-Health safeguards against cavities, early gum disease, enamel erosion, plaque, and also offers whitening and fresh breath. From Crest, the #1 toothpaste brand in America.