Thanks for the reply AHarleyGrl! I've never heard of that toothpaste you mentioned-will have to check it out. I use the Hydrogen Peroxide because it is the ONLY thing I have found that whitens my teeth. I've pretty much tried it all-every whitening toothpaste out there, tooth whiteners, etc. My teeth are just not very white...until using the HP. Did not know it was so bad for your teeth!