Colgate Plax Whitening Mouthwash has a stain prevention system that helps maintain the natural whiteness of your teeth. Use Colgate Plax Whitening Mouthwash twice a day after brushing & provide yourself with the oral health you deserve. Morning: Start your day with great fresh breath, whiter teeth & up to 12 hours protection against plaque & bacteria. Night: Finish your day with Colgate Plax Whitening Mouthwash to help ensure better Oral Health & a great start for the following morning. Clinically proven 12-hour protection against bacteria & plaque. Strengthens gums & protects against gum problems. With fluoride to fight cavities & strengthen enamel. Cleans even in the hard to reach places. Great refreshing taste for a long lasting fresh breath. Developed & clinically tested by dentists.