GU Energy Chews Mixed Flavors 18 Pack Nutrition : For daily training and competition, GU Energy Chews Mixed Box of 18 provides energy-dense calories in a conveniently portable packet. GU Chews help you sustain the necessary energy demands of endurance exercises and activities. This system features carbohydrates to help keep you energized without crashing. These delicious flavors also serve as a great treat in the midst of hard work. Gluten-free. Contains electrolytes that help maintain water balance and aid in optimum hydration. Caffeine (in select flavors) helps enhance performance by increasing focus and concentration. Contains branched-chain amino acids that may help reduce mental fatigue and muscle damage. Consume one packet 5 minutes before, and one packet every 45 minutes during activity. Flavors with Caffeine: Strawberry - 20mg per serving Flavors without Caffeine: Watermelon, Blueberry Pomegranate, & Orange.