Created for athletes whose focus is on hydration, GU Hydration Drink Mix is formulated with a blend of electrolytes and carbohydrates, providing a light-tasting and rapidly absorbing hydration drink. Sodium, the primary electrolyte lost in sweat, aids hydration by maintaining water balance. This 70-calorie serving of GU Hydration Drink Mix contains carbohydrates (maltodextrin and fructose) that use non-competing pathways to help maximize carbohydrate absorption and utilization while diminishing stomach distress. ELECTROLYTES Maintain water balance and aid in optimum hydration. CARBOHYDRATES Deliver ready-to-use energy and delay bonking by sparing glycogen. CAFFEINE Enhances performance by increasing focus and concentration and decreasing perceived effort during exercise. Mix one packet with 21 oz. (620 ml) of water. Hydrate before activity. During activity, drink 20-30 oz. per hour.