Professional Strength Endurance Hydration mix The new EFS-Pro drink mix is an ultra low osmolality, state-of-the-art endurance and hydration formulation that's engineered with the latest innovations and technology to meet the unparalleled requirements of professional athletes. EFS-Pro delivers higher levels of calories, electrolytes and other essential nutrients than other drinks without causing GI distress, even in the most extreme conditions. Plus, it's designed to taste like flavored water so multiple bottles can be consumed easily without the dreaded 'sweetness fatique.' EFS-Pro features a proprietary blend of carbohydrates that has unique benefits for endurance. The primary carbohydrate is a low osmolality amylopectin multi-branched cyclic dextrin that's 100% soluble in water. This means EFS-Pro can be mixed at stronger concentrations than other drinks and still be absorbed quickly and easily. EFS-Pro utilizes 'Optimal Absorption Technology' to shuttle more water, electrolytes and other essential nutrients through the digestive system efficiently without the negative side effects of GI distress, cramping or dehydration. EFS-Pro is also fortified with sodium citrate which is clinically proven to reduce stomach acidity and improve absorption. These technological advancements work synergistically meet the unique hydration and fueling requirements of elite athletes so they can push the limits of endurance in ultra-long races, extreme heat and other difficult conditions. FUELING TIP: We designed this formula to be mixed at varying strengths to suit your requirements. Each scoop is 40 calories. It can be used as a hydration drink at 80 calories in 12oz of water or a high-calorie formula at 120 or 160 calories in 12 ounces of water.