Essential Amin.O. Energy + Electrolytes. 100 mg of caffeine from natural sources (As much caffeine from natural sources as 8 fluid ounces of standard brewed coffee). Essential Amin.O. Energy plus electrolytes offers a combination of 5 grams of amino acids, 100 milligrams of caffeine [(100 mg of caffeine from natural sources) (As much caffeine from natural sources as 8 fluid ounces of standard brewed coffee), and electrolytes to support performance, endurance and active living. Benefits: + Supports everyday performance and goals. + Replaces electrolytes lost in sweat during exercise. + Supports endurance. Anytime energy + electrolytes.