Kingfisher Natural Toothpaste is the UK's leading brand of natural toothpaste. It contains no artificial colourings, flavourings, sweeteners or preservatives. Instead, they use natural ingredients. Real fennel and real lemons, for example. you'll find a complete list of ingredients on the back of the box, including their source and their purpose. Kingfisher was the first natural toothpaste to receive the important approval of the British Dental Health Foundation.