Colgate Sensitive Pro-Relief Repair & Prevent Toothpaste has an exclusive Pro-Argin formula with technology to provide instant and lasting sensitivity relief. Pro-Argin technology helps to seal and repair the sensitive areas of teeth. Sealed channels protect against pain caused by hot, cold and sweet stimuli. Sealed channels protect against pain for instant relief, and with regular use provide lasting protection to prevent sensitivity from coming back. Unhealthy gums can result in the channels that lead to the tooth's nerves becoming exposed, increasing your chances of sensitivity pain. With regular use, Repair & Prevent helps to strengthen gums and improve their overall health.