GU Roctane Energy Gel is designed for demanding workouts and races. It differs from the original GU Energy Gel thanks to its higher content of sodium, an electrolyte that contributes to hydration and protects against cramps. It contains more branched-chain amino acids (leucine, valine, and isoleucine) which prevent muscular and mental fatigue, and reduce muscle breakdown compared to the original GU Energy Gel.

It contains the amino acid taurine, which helps with heart contraction and improves cardiac performance and power during long-duration training. In addition, the amino acid beta-alanine promotes the formation of the intramuscular molecule carnosine, reducing lactic acid buildup and thus lessening pain and discomfort in the joints and muscles.

The 100 calories provided by GU Roctane Energy Gel contain carbohydrates (maltodextrin and fructose) that use non-competing pathways to maximize carbohydrate absorption and utilization, while minimizing gastrointestinal disturbances.