Product Highlights 100mg Caffeine From Natural Sources for Energy & Focus Electrolytes for Enhanced Hydration to Support Performance & Active Lifestyle 5g Aminos for Enhanced Recovery & Performance Whether you are looking to perform better in the gym, knock out a study session or dominate your work day, Optimum Essential Amino Energy RTD is the perfect solution for you. Formulated using 100mg of natural caffeine for energy and focus and including 5g of amino acids for enhanced recovery and support of your active lifestyle. In a perfect sized can and sporting world class, refreshing flavors, Optimum Amino Energy RTD is the ideal, versatile choice for all. Key Benefits Natural, Smooth Energy & Focus Enhanced Recovery Zero Sugar; Only 5 Calories