GU Roctane Energy Gel - Cold Brew Coffee, Box of 24To avoid bonking while exercising, you need a portable source of easily digestible carbohydrates to fuel your muscles. ROCTANE Energy Gels are designed for long duration and high intensity training and racing with more electrolytes for hydration and amino acids for your muscles. Contains 70mg of Caffeine per serving ROCTANE Energy Gel contains 3x the branched chain amino acids (BCAA's) and 2x the electrolytes compared to GU's original Energy Gels