Want a premium carbohydrate bar to boost your performance in endurance training or team sports? Energize Bars from Powerbar are packed with 39g of easily-digestible carbohydrate in the form of the patented Powerbar C2Max glucose-fructose blend. Each bar also includes the electrolytes sodium and magnesium. They are best used before and/or during exercise to give you a constant supply of carbohydrate during your endurance training.