CB12 Whitening Peppermint Mouthwash is scientifically proven to help whiten teeth after two weeks, used twice a day after brushing. It helps reduce staining particles (for example, those caused by coffee, tea, red wine and nicotine) that cause teeth discolouration and helps protect against new stains. Key Features of CB12 Whitening Peppermint Mouthwash Clinically proven 12-hour breath neutralising effect. Includes 0. 05% sodium fluoride, an ingredient proven to strengthen your enamel with daily use. Removes stains and discolouration for whiter teeth after 2 weeks. Does not contain alcohol. Soft mint/menthol flavour. Please note that results may vary.