GU Energy Hydration Electrolyte Drink Tablets, (Lemon Lime, 4-Count)GU Energy Hydration Electrolyte Drink Tablets provide a hydration boost by supplementing water with electrolytes, and replenishing the sodium that is lost through sweat, for improved performance and recovery while training and racing. Each drink tab contains just 10 calories, in addition to 320 milligrams of sodium and 55 milligrams of potassium to help maintain water balance and enhance muscle function as electrolytes are depleted by exercise and