To avoid bonking while exercising, you need a portable source of easily digestible carbohydrates to fuel your muscles. GU Energy Chews pack energy-dense calories in a portable packet to meet the demands of all types of activity. Each 80-calorie serving (four pieces) contains carbohydrates (maltodextrin and fructose) that use non-competing pathways that can help maximize absorption, increase carbohydrate utilization, and diminish stomach distress, for energy that kicks in quickly and stays with you.