Prevent cavities and strengthen enamel to help your teeth thrive. Help keep cavities away with ACT® Anticavity mouth rinse. You get a triple-action formula that strengthens teeth protects against cavities and freshens your breath. This swish will give your teeth a superior cavity safeguard — especially compared to just brushing alone. Plus your teeth will be up to four times stronger* when it s used regularly. That’s why ACT® is the #1 dentist-recommended anticavity mouth rinse brand available over the counter.