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SmartMouth is on the shelf at your Walgreens — and it's the only mouthwash proven to prevent bad breath for 12 hours per rinse. Patented zinc-ion technology that stops sulfur gas production at the source. Not masked for 60 minutes — blocked for 12 hours. Two rinses a day for 24-hour protection. Alcohol-free. Dentist developed. Available in the oral care aisle at Walgreens locations nationwide.