How it works: Again, it’s all about saliva: Chewing gum increases its production and chewing just one piece makes your mouth create up to 10 times more saliva than usual. But not just any pack will do. “Gum that contains sugar actually feeds the bacteria that generate sulfur compounds,” says Robin Lucas, a dentist in Hoboken, New Jersey. Instead, look for gums that contain natural sweeteners called sugar alcohols, such as xylitol and sorbitol. Try Trident Vitality ($1.30 at drugstores). Sugar-free mints also stimulate saliva production and temporarily mask odor.
Good to know: If you are not accustomed to sugar-free gum, go easy at first. For some people, sugar alcohols can cause stomach discomfort, bloating, and gas.