What sort of testing has P&G performed on Crest Pro-Health Rinse?
We conducted comprehensive studies on Crest Pro-Health Rinse to prove its safety and effectiveness. Information on our clinical and technical data is available on our professional website, www.dentalcare.com. In these studies, the level of temporary, surface-level tooth discoloration found was similar to that of other mouthwashes that effectively fight plaque and gingivitis.