Brushing twice a day with Sensodyne Pronamel Multi-Action helps to: Protect from the effects of acid wear Restore natural whiteness Clean effectively Freshen breath Provide cavity protection Maintain healthy teeth and gums Healthy, stronger & better protected enamel. Pronamel toothpaste has a unique formulation to help protect teeth against the effects of acid erosion (1). It helps minerals penetrate deep into the enamels surface, actively strengthening and re-hardening weakened enamel, making it stronger, healthier and better protected from the effects of everyday acids. (1) With twice daily brushing Even healthy teeth can be affected by acid erosion caused by everyday foods and drinks. Acids in your diet, such as fruit, wine and fizzy drinks can weaken the enamel surface. Over time, weakened enamel can be more easily worn away and your teeth can get visibly thinner and transparent at the edges.