100% Xylitol Natural Dental Defense System Healthy Teeth - Happy Teeth Non-GMO Gluten-Free Sweetened Only with Xylitol Halal Kosher Spry Dental Defense System Spry-Improving Oral Health Clinical studies have shown that the use of xylitol on a daily basis, spread throughout the day, may reduce the risk of tooth decay and improve overall oral health. Every batch tested in USA to ensure the highest quality.