Allulose is classified as a “rare sugar,” because it’s naturally found in small amounts in a few foods—including figs, raisins, molasses, and maple syrup. Like glucose and fructose—the two components that make up sucrose, or table sugar,—it’s a "monosaccharide," or simple sugar. Greendahan Liquid Allulose is a delicious calorie free liquid sweetener that tastes like sugar with a mild, clean sweetness, no bitterness and no aftertaste.