Monster Energy Ultra Black, Sugar Free Energy Drink, 16 Ounce A crisp, refreshing, and less sweet citrus & dark cherry refreshment that is great for any occasion. Zero Calories, Zero Sugar. Not recommend for children, people sensitive to caffeine, pregnant women, or women who are nursing Full load of our Monster energy blend; sugar free and without the Glucose Same Monster Energy boost without the heavy, sweet flavor and texture Monster packs a powerful punch but has a smooth easy drinking flavor