ACT® Total Care Sensitive Formula* is strong enough to strengthen tooth enamel yet gentle enough for sore mouths. The non-burning alcohol free formula is made with natural botanicals. It kills bad breath germs for fresher breath and strengthens tooth enamel for up to 2x stronger teeth. Fluoride is a natural mineral that can safely strengthen teeth to help prevent tooth decay and permanent tooth loss which is usually caused by acids released by bacteria found in plaque. When a tooth s surface is weakened by decay fluoride can be absorbed into the weakened tooth surface to strengthen the enamel. Amazingly the new tooth material created by this strengthening process is even more durable than the original.