What Is Chemix EAA Plus? Chemix EAA isn't just Essential Amino Acids. Chemix has also included a unique mushroom blend. This can enhance recovery, oxygen flow and boost your immune system. Chemix EAA includes all 9 EAA at clinical doses. It was formulated to help maximize muscle protein synthesis. How Does Chemix EAA Work? Chemix EAA uses specific ratios of EAA.