Colgate Sensitivity Pro Solution toothpaste blocks pain by filling the microscopic channels leading to sensitive nerves. When used regularly, it creates a long-term protection shield against tooth sensitivity. While it gently and effectively removes stains with its reduced abrasive formula, it helps your teeth regain their natural whiteness. Colgate Sensitivity Pro-Solution toothpaste has a unique Pro Argin formula - patented by Colgate - a new technology that dentists use to relieve sensitivity in their patients' teeth.