More sodium an electrolyte that aids in hydration and even more branched chain amino acids leucine valine and isoleucine that reduce mental fatigue and decrease muscle damage than our original gu energy gel the amino acid beta alanine helps promote formation of the intramuscular buffer carnosine while ornithine alpha ketoglutarate helps promote muscle repair the 100 calorie packets contain carbohydrates maltodextrin and fructose that use non competing pathways to help maximize carbohy