Natural flavor. No artificial flavors, colors or preservatives. More Energy with C2 Max Dual Source Energy Blend. PowerBar Smoothie Energy Bar is a great choice for use before and during higher intensity competitions or training sessions like running, cycling and swimming. Its formulated to be easy to digest and made with PowerBar's C2 Max dual source energy blend for more energy to muscles. In fact, C2 Max was designed to have the same blend of energy sources found in breakthrough studies to deliver 20-50% more energy than glucose alone, and in another study to improve athlete's cycling times by 8%. Power to Push. Made in U.S.A.