Xylitol is a naturally-occurring sugar. Research has shown that if used correctly, xylitol can help to eliminate the bacteria that cause cavities (it may also prevent ear infections in children, along with other benefits). Look for 100% xylitol-sweetened products such as mints, gums, and rinses. If used consistently several times a day for several months, xylitol may prevent your child from ever developing a cavity!