CLIF BLOKS Energy Chews are a delicious source of quick carbs with 33 calories per cube to help fight fatigue during long runs, games, and other high-intensity workouts. Our bite-sized energy chews come in a variety of sodium and caffeine levels in a package that's easy to carry and open. CLIF BLOKS are also non-GMO, with no high-fructose corn syrup or artificial flavors.