Sensodyne ProNamel gentle whitening toothpaste is protect against the effects of acid erosion while re-hardening your enamel and gently whitening your teeth. Acids in your diet can soften the protective surface of your tooth, making it more vulnerable to being worn away over time. ProNamel gentle whitening toothpaste is specially formulated to protect teeth against the effects of acid wear. ProNamel gentle whitening`s formula delivers fluoride deep into your teeth`s surface - while gently whitening your teeth at the same time.