Train with the Roc. Race with the Roc. Ultra endurance energy gel. This Roctane Ultra Endurance duo produces the worlds hardest working athletes with flexibility in developing a personal nutrition plan for training and racing. Use them together. We think youll see superior results when combining your determination with Roctane gel and drink. Roctanes advanced formula amplifies GUs original energy gel formula and adds key ingredients to boost your chances of success. OKG, an Amino Acid Complex, aids muscle after intense workouts. Optimal Complex-to-Simple Carb Ratio, provides rapid and lasting energy. Branched Chain Amino Acids, provide an additional fuel source & help maintain concentration. Histidine, moderates energy-sapping acid build up. Gluten-free. No Caffeine.