Sensodyne Pronamel lntensive Enamel Repair Whitening Toothpaste is proven to drive minerals deep into the enamel surface to help actively repair acid-weakened areas of the enamel, for stronger, better-protected teeth. Acids in your diet can weaken tooth enamel over time, exposing a dull yellow layer and making it more susceptible to further damage. While any toothpaste containing fluoride helps prevent this erosion, Intensive Enamel Repair, Pronamel�s most advanced enamel care formulation, is proven to help actively repair acid-weakened enamel and protect teeth from future acid erosion. It works by locking in minerals into the surface of the enamel. It helps repair and rebuild microdamage in the enamel suface. Helping protect enamel against future acid wear.