AUTHENTIC ISO is made exclusively with grass-fed whey protein isolate - one of the richest sources of essential amino acids (EAAs) and non-essential amino acids (NEAAs) that are vital for optimizing muscle growth. The whey protein isolate in AUTHENTIC ISO is rapidly assimilated and broken down into small peptide chains and individual amino acids, which signal the body to “turn on” muscle protein synthesis and shut off muscle protein breakdown. Quite simply, AUTHENTIC ISO rapidly floods your muscles with amino acids that they require to repair, recover, and grow!