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, Pronamels 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 repairing minerals that absorb deep into the surface structure of enamel to help repair microdamage and rebuild enamel strength, leaving your teeth stronger and more protected.