Toms of Maine NaturalAntiplaque and Whitening Fluoride-free Peppermint Toothpaste contains xylitol to help prevent plaque, zinc citrate to control tartar, and silica for whitening. Toms of Maine uses zinc citrate sourced from zinc - a naturally occurring mineral and xylitol, a natural ingredient derived from birch trees or corn. Plus, natural flavoring for a taste that will make you look forward to brushing.