I have not yet used the product but it sounds great and not harmful at all. It’s expected to be slightly more effective in removing stains from teeth, caused by smoking, tea and coffee, than the basic Everyday formula because of its more abrasive quality. However, it is still safe to use on a regular basis, but, again, it does not appear to contain any actual bleaching compounds that would be likely to make the teeth any lighter than their original colour, and should be seen as a good cleaning toothpaste rather than a whitening product.