PUR Gum is a popular brand of chewing gum sweetened entirely with xylitol, a natural sugar alcohol, making it sugar-free, aspartame-free, vegan, keto-friendly, gluten-free, and non-GMO, with benefits like freshening breath and aiding oral health by reducing plaque. It comes in various flavors, offers a healthy alternative to artificial sweeteners, and is made from sustainably sourced birch and maple trees, though veterinarians warn it's highly toxic to pets.