Embrace the Power of Mother Nature! At Tom's of Maine that means we use authentic, natural ingredients. In our Antiplaque & Whitening toothpaste we use zinc citrate sourced from zinc – a naturally occurring mineral – and xylitol, a natural ingredient derived from birch trees or corn. Plus, natural flavors for a taste that will make you look forward to brushing! We produce this toothpaste without fluoride because we respect our customers' diverse needs and interests.