With the Optimum Nutrition Essential Amino Energy, you get the energy and focus to achieve your goals and take on whatever life throws at you. The Essential Amino Energy is scientifically designed to support your energy needs and your long-term training. One serving of the powder increases energy and alertness with 100mg of caffeine from natural sources and a burst of flavour you’ll look forward to mixing into cold water anytime. Take a 30-serving tub along to the gym or your office – wherever your busy day takes you.