Fluoride-Free Natural. Antiplaque Whitening. Fresh Breath Helps Fight Tarter. No Artificial Dyes or Sweeteners. Kosher Halal. Cruelty Free. BPA Free. Fluoride-Free Antiplaque & Whitening. Embrace the Power of Mother Nature! At Tom's of Maine that means authentic and effective naturally sourced ingredients. We use 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!