Within the European Union, the rules on nutrition declaration are the same (Food Information to Consumers Regulation (EU) No 1169/2011). One of the things that must be included on the label is the caloric energy value of a product. This energy value must be declared both in kJ (kilojoules) and in kcal (kilocalories). The caloric level of an energy drink depends on the added ingredients, such as the type of sweetener. Energy drinks are mostly sweetened with sugar, but there is also a variety of sugar-free options available, which are sweetened with intense sweeteners like aspartame. Therefore, consumers have a choice of energy drinks with different calorie levels.