GU Energy Gel is specifically formulated to energize your body during exercise. Using GU during your regular workouts will keep your mind alert and active, and your muscles going strong. GU gives the most concentrated form of immediate energy with no stomach bulk or distress, is quickly and efficiently absorbed, and will maintain your blood sugar at the optimal level for a great workout start to finish. GU Energy Gel contains maltodextrin, the best complex carbohydrate for delivering energy to working muscles. GU also contains the optimal balance of carbohydrates for the body during exercise: 80% complex/20% simple. It is this balance of maltodextrin and fructose in GU that delivers a quick rise in blood sugar and maintains that glucose level for up to 45 minutes during exercise.