As an endurance athlete, meaning your events typically last more than two hours, you need to take in between 80-120g of carbohydrate per hour. The Science in Sport Beta Fuel Dual Source Energy Drink delivers an optimised 80g of carbohydrate in a single, convenient isotonic fuelling solution with minimal risk of GI discomfort that enables you to maintain optimal performance. One sachet of Beta Fuel Energy Drink contains one serving (82g) of powder. Tip the mix-and-go formula into 600ml of water and shake to dissolve. It's that simple. Ingredients Maltodextrin (from Maize) (57%), Fructose (42%), Flavourings.