GU Energy Chews offer a change of pace from gels and an answer to that moment in your run, ride, ski, swim, hike.... when you just gotta have something to chew on.. . . . . GU Chews deliver the premium ingredients and performance benefits you've come to expect from GU Energy products. 90 calories per packet. Carbohydrates deliver ready to use energy. Amino acids reduce mental fatigue and decrease muscle damage. Electrolytes maintain water balance and aid in optimum hydration. Exclusive blend of complex and simple carbohydrates. Caffeine helps increase concentration and focus.