Over a year of RDA tests were done on various types of teeth (family members, friends, scientists, dentists, volunteers) to ensure that our formulation has the right ratio of ingredients (especially charcoal) that could remove the stubborn stains on the surface of our teeth without harming the enamel and results were evident.We haven't done any specific test on plaque removal/build-up so we can't claim that it does.However, we have received feedback from some of our regular users and amongst our team as well that there is noticeably much less plaque build-up since using our product.We as a brand still do not claim that it does as there is no valid scientific proof but what these customers may have experienced is that using our product does help in reducing further plaque or tartar build-up and not necessarily the removal of it. We still think that a proper scaling treatment by a professional dentist works best in the removal of plaque/tartar.Once we are able to start on proper testing and get positive results, then we can safely publish it accordingly :)