Contains xylitol to help prevent plaque and silica for whitening. Naturally, it works. Helps prevent plaque buildup.What is silica ? Silica is a mild abrasive derived from sand. The silica in our toothpaste improves cleaning and removes stains that form on your teeth over time, making your teeth whiter.What is xylitol ? Xylitol is a natural ingredient derived from birch trees or corn which helps in the prevention of plaque buildup.