Research-backed ingredients. Clinical dose. Full transparency. All power. - New Muscletech Amino Max Black Onyx is a powerful muscle building BCAA and amino formula built with scientifically advanced ingredients to empower strength, muscle recovery, ATP production and electrolyte replenishment. The unique formula an advanced 2:1:1 BCAA blend delivering three forms of L-Leucine, the most anabolic BCAA. Supercharged Strength and Recovery - Amino Max Black Onyx delivers a superior 8g of BCAAs supplying a researched 4g of L-leucine, plus it's armed with glutamine and pure L-citrulline. Many competitors only include a supportive dose of L-citrulline malate which provides an inferior dose of true L-citrulline. What's more, Amino Max Black Onyx also features a researched dose of elevATP to boost ATP production and increases strength. Powerful dose of elevATP - this clinically studied key ingredient provides your muscle cells with the edge they need to help you set a new personal best. Researchers believe that elevATP increases mitochondrial ATP production to increase muscular energy when the going gets tough. In fact, recently published human clinical research has indicated that elevATP can increase the body's ATP levels to help you train longer and with more intensity.