GU Roctane Energy Gel is the premium energy source for ambitious endurance athletes. The unique gel contains all the ingredients of the Energy Gel in higher doses and other ingredients like OKG amino acid complex. Roctane is therefore ideal for all marathon runners, triathletes and other extreme athletes. Standard GU Gel contains a perfect blend of complex and simple carbohydrates, electrolytes, the exclusive GU amino acid blend, and (for some types) caffeine, all ingredients for energy delivery during endurance sports.