BCAA Nitrogen Formulation MET-Rx® Hi-Test Liquid Amino is the easily digested Amino Acid source specially designed to be used as part of a hardcore training regimen. • Features Amino-Sorb technology… for rapid Amino Acid delivery right when you need it • Contains a blend of essential amino acids, including all three branched Chain Amino Acids (BCAAs) • Amino Acids serve as protein building blocks* • Specially formulated for bodybuilders, powerlifters and athletes