Hi..... To reduce or prevent bad breath: Brush your teeth after you eat. Keep a toothbrush at work to use after eating. Brush using a fluoride-containing toothpaste at least twice a day, especially after meals. Toothpaste with antibacterial properties has been shown to reduce bad breath odors. Floss at least once a day. Proper flossing removes food particles and plaque from between your teeth, helping to control bad breath. Brush your tongue. Your tongue harbors bacteria, so carefully brushing it may help reduce odors.