Xylitol [pronounced zy-li-tol] is a substance that occurs naturally in fibrous fruits like plums and strawberries. It also occurs in vegetables like corncobs and mushrooms and hardwood trees like birch. Nirvana Xylitol™ is derived from non-GMO, non -allergenic corn cob (core) – an environmentally sustainable source of the natural ingredients. It is good for you and good for the environment!