ISDIN Bexident Whitening Toothpaste is a whitening toothpaste that starts showing results after just 7 days of use. Not only does it help whiten the teeth, but also strenghtens the enamel by remineralizing it and preventing plaque formation, which is one of the main reasons teeth become yellow. Thanks to its new technology Pro-Tech Whitening Technology, it can actually be used daily by people with teeth sensititvity, since it does not disrupt teeth protection.