Flavor:Tri Berry | Size:8-Count GU Original Sports Nutrition Energy Gel isthe energy gel that started it all. In 1993, Dr. Bill Vaughn developed theworlds first energy gel to help his daughter perform better during ultra-marathons, and GU has been helping to propel the worlds most successfulextreme athletes to success ever since. GU Energy Gel sustains all forms ofathletic activity with a highly compact, portable, and calorie-dense packetthat is loaded with carbohydrates that can be rapidly absorbed. Branched-chainamino acids limit muscle fiber damage and increase speed of recovery, andextra electrolytes help maintain water balance. Some flavors feature caffeineto increase concentration. While the original formula has been tweaked andevolved over the years, the end result is still the same: GU Energy Gels fuelthe best endurance athletes in the world. GU Original Energy Gel comes in awide variety of good tasting flavors. Each packet contains 450mg of Aminoacids, 100 calories, and at least 21g total carbs.