doTERRA On Guard Natural Whitening Toothpaste combines the protective benefits of doTERRA On Guard with other natural ingredients and polishing agents that help clean and whiten the teeth. doTERRA On Guard blends Wild Orange, Clove, Cinnamon Bark, Eucalyptus, and Rosemary essential oils to provide an extra cleaning boost. Additional essential oils like Peppermint and Wintergreen, as well as the natural sweetener xylitol, give this toothpaste a unique cinnamon-mint flavor that leaves your breath—and toothbrush!—fresh and clean all day. Hydroxyapatite is a natural oral care ingredient. Experimental research indicates it can help remineralize and restore tooth enamel. To keep your teeth healthy and free of cavities and enamel erosion, the enamel needs to be constantly built back up or remineralized. Hydroxyapatite helps make your teeth feel stronger, smoother, healthier, and less sensitive to hot or cold. Hydrated silica helps remove tooth stains, but it’s gentle enough to avoid damaging tooth enamel.