The 9 essential amino acids include Leucine, Lysine, Isoleucine, Phenylalanine, Valine, Tryptophan, Methionine, Threonine, and histidine. MUTANT GEAAR has them all + arginine, which some studies show can help enhance the uptake of the EAAs. More and more sports nutrition studies are recognizing the benefit of EAAs within the diet – in fact the EAA level of proteins has been a growing area of research and the results seem obvious and compelling – if you’re not maxed out on your EAA intake, you’re very likely leaving recovery and muscle protein synthesis results untapped!