For tea-rific breath, try a cup of tea. Studies suggest that drinking unsweetened black or green tea may help ward off bad breath. Both types of tea contain antioxidants called polyphenols that can help destroy the growth of bacteria that cause bad breath—although green tea contains more because it is processed in a different way. A study conducted at Pace University, for example, found that green tea extracts were effective at fighting several types of oral bacteria by preventing their growth. Polyphenols also reduce those nasty sulfur compounds. for a tasty treat that also helps banish bad breath.