Fantastic product. I bought the pet version after my vet said that my 10 year old cat would need a dental clean in the next year or so, which I was keen to avoid for the sake of her health and my wallet. I gave it to my two cats and my Border Terrier and I've seen a real difference. I thought I may as well try the human version because I've had to have yearly dental cleans myself since moving from the north of England to the south (I can only assume because of the change in water). My teeth now look and feel smooth and clean all day, I can't recommend this product highly enough for people or animals.