GU Roctane Ultra Endurance mix fuels your longest, hardest efforts. This energy drink mix is crafted for endurance, delivering fast-acting carbohydrates, critical electrolytes, and amino acids. It helps athletes stay hydrated and energized during intense activities and extended activities. Each serving contains 1900mg amino acids, 320mg sodium, and 35mg caffeine, available in Lemon Berry flavor with other natural flavors.