Mix up Essential Amino Energy anytime you want a fruit-flavored or coffeehouse-inspired boost of energy and alertness. Add 2 scoops to water for an afternoon pick-me-up, or use 4 scoops as a pre-workout drink with 10 grams of amino acids and 200 mg of caffeine from green coffee and green tea extracts. Optimum Nutrition is one of the few sports nutrition companies that owns and operates its own production facilities. As one of the world's largest producers of sports nutrition products, On remains focused on high quality standards. Its Quality Assurance team carefully reviews raw materials to help ensure consistency and excellence in every product.