Hi, Dr Ellie.
On your website you say repeatedly that people on your system will notice that their teeth appear progressively whiter and whiter. I understand the science of this from your blog, but what I don’t understand is why your blog pages aren’t full of people confirming that their teeth have indeed become whiter. There are some people who have reported yellower teeth on your system, but none (as far as I can see) reporting whiter teeth. Perhaps if you would publish this email on your site, people will respond to the challenge and write in with their success stories of whiter teeth.