GC Tooth Mousse Plus is fantastic for sensitive teeth. The aim of this product is to protect the tooth's structure, if you happen to drink a lot of caffeine & alcohol to name. I apply two pea sized amounts of this product, to both the top and bottom teeth prior to using the dentists in home whitening trays. This minimises the sensitivity to one's teeth with tooth whitening products such as Opalescence. Comes in five different flavours.