GU Roctane Ultra Endurance Energy Gel is a re-engineered formulation of the GU you already know and love. It's made for the extreme needs of elite athletes. How is it different? Roctane is GU, plus or minus some key ingredients. It packs the same calorie punch as GU and features their blend of complex and simple carbs for steady power production, electrolytes for proper water balance, and caffeine to tap into late-race muscle reserves. It lacks the vitamins C and E. Instead, what you'll get from Roctane is added amino acids to slow lactic acid production, serve as fuel, aid recovery from hard efforts, and mitigate fuzzy-headed weariness. Also, the addition of OKG, an amino acid complex that mitigates catabolic effects that break down muscle tissue, helps to minimize fatigue and muscle damage during repeated days of hard efforts. GU Roctane is available in Blueberry Pomegranate, Cherry Lime, Pineapple, and Vanilla Orange. Sold in a box with 24 individual packets.