Mix up ESSENTIAL AMIN.O. ENERGY anytime you want a boost of energy, focus and muscle recovery support. Each serving provides 100 mg of caffeine from natural sources to support energy and focus along with 5 grams of amino acids. Amino blend consists of Essential Amino Acids including Branch Chain Amino Acids along with Beta-Alanine, Taurine, Glutamine & Citrulline, etc.