This is normally about £2.76 but my local Tesco were selling these for just a £1.00! That's cheaper than teh normal Sensodyne toothpaste! I use this stuff as I've got sensitive teeth and it does make a difference imo.
When used 2-4 times daily, Sensodyne Pronamel aids re-hardening of tooth enamel to help protect teeth from acid erosion. Its neutral pH is kind on tooth enamel. It is also specially formulated for sensitive teeth.