Sensodyne Original Sodium Chloride Toothpaste is recommended by dentists all around the world for both sensitive teeth and acid wear. Its unique formula contains strontium chloride hexahydrate, which is clinically proven to relieve pain of sensitive teeth. It is an active ingredient that blocks opening in the bony tissues of your tooth and prevents from causing painful sensations. Sensodyne toothpaste provides long-lasting protection against sensitivity, mainly, and other harmful substances that might cause harm to your teeth and gums.