I used a well-known whitening toothpaste for a few years, and noticed my teeth getting more and more sensitive, which I put down to getting further into my 40s. This has wound back the clock, and really made my teeth feel good, with no sensitivity. They haven’t magically become model white, but I’m happy with how white they look. I’m often sceptical around hype in adverts (where I came across Zing), but this is a great product.