Builds increasing protection against painful sensitivity of the teeth due to cold, heat, acids, sweets, or contact; aids in the prevention of dental cavities. Dentists have been recommending Sensodyne for over 20 years. Brushing twice a day with Sensodyne builds a 'shield of protection' against painful sensitivity. And, since Sensodyne has fluoride, it helps protect against cavities too. Use Sensodyne whenever you normally brush: It contains Potassium Nitrate, clinically proven to reduce painful sensitivity. It provides fast relief of tooth sensitivity within two weeks. It has fluoride for cavity protection. It fights tartar and plaque build-up above the gum line, and promotes healthy gums with regular brushing. Its great taste keeps mouth feeling fresh and clean. It whitens teeth by removing surface stains. This product contains no sugar.