Shake to activate! Dentyl Dual Action mouthwash contains an advanced dual phase formula that you can see working instantly with each use. A recent clinical study found that rinsing with Dentyl Dual Action mouthwash twice a day reduces plaque by more than 60% after just 28 days of use*! Regular use can help prevent plaque build-up, strengthen and protect teeth and gums, freshen your breath for up to 12 hours, and contribute to overall gingival health over time.