Why is it so hard to find cinnamon toothpaste or cinnamon gum?

Have you ever heard of the Cinnamon challenge? Well if not, search on YouTube. Swallowing cinnamon, or at least keeping it in your mouth for 30 seconds is practically physically impossible. Cinnamon Toast Crunch (cereal) and other Cinnamon foods are only edible because they aren't NATURAL cinnamon. Plus, who says its good for your teeth? Because its NOT.