Pronamel Active Shield is proven to actively reinforce weakened enamel. Helps with 2x stronger resistance against dietary acids, helps shield the enamel against erosion and cavities, and gently removes stains for whiter teeth. One 3.4 oz tube of Cool Mint flavored Sensodyne Pronamel Active Shield Whitening Enamel Toothpaste #1 Dentist Recommended toothpaste for Protecting and Strengthening Enamel Sensodyne Pronamel Active Shield Whitening Toothpaste offers 24 hour cavity protection (1) This toothpaste with fluoride builds 2x the acid resistance from day one against dietary acids versus your mouth’s natural defenses to help keep teeth strong and healthy with a fresh breath feeling Fluoride toothpaste helps remineralize the surface of teeth to improve resistance against acid attacks