Works in 3 ways 1 Helps protect against cavities and decay 2 Gently cleans delicate gums 3 With fluoride to help strengthen teeth Children's tooth enamel is thinner than adult tooth enamel and is more susceptible to attack from plaque acids, the cause of cavities. Wisdom Step by Step 4+ toothpaste has been specially developed with the recommended level of fluoride (1450ppmF) to help teeth stay strong and protected against sugar acid attack†. Sugar acid protection Recommended fluoride level Gentle cleaning † When used twice daily. To keep healthy teeth for life it is important to start good habits young. The Wisdom Step by Step range of toothpaste, toothbrushes and mouthwash have been developed to meet children's evolving oral care needs to grow with your child Step by Step.