Energy drinks are functional beverages with a beneficial effect for those who want to be active. They have not been formulated to deliver rehydration. Energy drinks are different from sports drinks due to their different composition and function. Sports drinks are specifically designed to help people rehydrate. They contain carbohydrates and electrolytes (such as sodium, chloride and potassium). Sports drinks normally do not contain ergogenic (performance enhancing) substances such as caffeine. In general, it is recommended to drink lots of water during sports, especially during intense exercise. Just recently, the European Food Safety Authority (EFSA, 2015) has concluded that up to 200 mg of caffeine from all sources (including energy drinks) “do not raise safety concerns when consumed less than two hours prior to intense physical exercise under normal environmental conditions.”