Over the years I have tried a few bleaching products. They worked ok, but the effects were not long lasting for this coffee/tea drinker.I did have longer lasting effects by ending up with sensitive teeth.Then I found the Colgate Luminous toothpaste.Your teeth are gently whitened. With continued use, they stay that way.It does not hurt sensitive teeth. It does not burn my lips like many toothpastes do.It is supposed to strengthen tooth enamel. I like that benifit also.