a - glycine , agmatine, creatine

b - lysine, tyrosine, phenyalaline proline, serine, threonine, ornithine

c - glutamic acid, BCAAs , citrulline, arginine,aspartic acid, carnitine

d - methionine, cysteine, tryptophan

glycine is only a tier because it causes sleepiness
lysine is b tier because tends to lower body temperature
agmatine not technically a protein but included
taurine has the benefits of glycine and heart protective properties of lysine, making it s tier

agree?
disagree?