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 to meet the demands of all types of activity and contain 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.