Yes it does. I went to my dentist. He recommended it because I was looking into teeth whitening. Went back to him for a cavity to be filled about a month later and he noticed a difference without me even telling him I started it. Love it. Now I just wish my husband would use it. LOL Now I have to buy two different kinds of toothpaste. He uses Crest....just not that one.
Yes it does work. But if you are sensitive to any tooth whitening products this may make your gums or teeth sensitive. I also use it in cycles because like any other tooth whitening systems it can be abrasive on your teeth and remove enamel.