The healthy way to sweeten your favourite foods! Unlike other sugar substitutes, xylitol is completely natural. Sometimes called "birch sugar" due to its primary commercial source, xylitol is technically a "sugar alcohol" that behaves differently than a pure carbohydrate. Derived from 100% U.S.-grown birchwood, Swanson Premium 100% Pure Xylitol Powder is a low-calorie, low- gylcemic-index alternative that can replace the sugar in almost any recipe.