New Formula with Hydroxyapatite Nelson Naturals Activated Charcoal Toothpaste - Using simple and high quality ingredients including colloidal silver and hardwood xylitol with the addition of Activated Charcoal!  Well known for its detoxifying properties, Activated Charcoal can also help to whiten your smile. It works by acting like a magnet for Plaque, Bacteria and Tannins that may stain your teeth.