Crest Pro-Health has to be the worst toothpaste ever. They even say it on the back (products containing stannous flouride may cause staining of teeth!). What kind of toothpaste can do that for you?!? Some people dont have any problem with it, but there are a lot of people like myself that have started seeing black and brown stains inbetween the teeth. I thought i was doing something wrong, so i asked my dentist and he narrowed it down to the stupid toothpaste i was using. I read the warning label on the back of it and then it was in the trash!

 Do not use this toothpaste unless you want to risk...