The key ingredients and specific dosages in both True Fuel and True Electrolyte are based on months of researching and reviewing scientific literature to ensure the products perform where you need them most. Although True Electrolyte contains some carbohydrates as well as premium electrolytes, the dosage is purely for the purpose of fast and effective rehydration or maintaining adequate hydration. If you require an energy source to fuel a strenuous training session or event where you also want to prevent catabolism, then True Fuel is the preferred choice.