All of the following are essential aminoacids except:
Threonine, Lysine, Phenylalanine, Methionine, Isolcucine & Leucine, Tryptophan, Valine > Histidine >> Arginine are nutritionally essential amino acids. Among these last two (histidine & arginine) are semi- essential, and arginine is more essential than histidine.
Methionine
Lysine
Alanine
Leucine