According to a study recently published in the Journal of the American
Dental Association, use of carbamide peroxide solution for tooth
whitening is as safe as using plain hydrogen peroxide.
The study notes that patients were asked to report any signs of gum or
tooth sensitivity throughout the trial, and that the authors found no
significant differences between the two groups.
A clinical evaluation of carbamide peroxide and hydrogen peroxide
whitening agents during daytime use.
Mokhlis GR, Matis BA, Cochran MA, Eckert GJ.
Indiana University School of Dentistry, Indianapolis, USA.
Journal of the American Dental Association 2000 Sep;131(9):1269-77
NatureWhite does have FDA approval, so it can be assumed that the
product is safe to use, as long as it is used in accordance with the
Hope that helps!
Search terms: [ carbamide peroxide ] at PubMed