Desensitizer: Natural potassium helps to desensitize the dental nerves and relieves the tingling sensation and pain associated with sensitive teeth. Occlusion of tooth tubules: The natural ingredients in toothpaste help form a protective layer on the tooth enamel and cover the exposed tooth tubules: HiOra-K toothpaste contains natural astringents that help tighten the gums and prevent them from receding. This helps the gums to fit tightly around the teeth and to combat the erosion of the enamel, which is the main cause of sensitive teeth.