Stay focused and alert throughout your workout with Essential Amino Energy by Optimum Nutrition. Amino Energy provides 160 milligrams of caffeine from green coffee and green tea extracts to break down exercise barriers and lead to more consistent workouts. One serving is just 10 calories and contains 5 grams of amino acids with ZERO carbs or sugar to help keep you focused and energized. Amino Energy is available in a variety of fruit flavors such as Blueberry and Fruit Fusion. It is also available in coffeehouse-inspired flavors such as Iced Café Mocha Cappuccino and Iced Caramel Macchiato. Purchase yours today from optimumnutrition.com.