Whilst they maybe true, my dentist yesterday mentioned that Crest total is causing alot of sensitivies, I have tried ALL sensitive toothpaste and the only one that doesn't make my lips peel is Colgate sensitive!
AS for ulcers, that can be true however Crohns minor side effects are sore tongue and cankers, toothpaste or not we get them from time to time. Mine show up on Flagyl which is known to cause ulcers.