The present invention relates to novel liquid methionine compositions derived from the crystallization mother liquor of the methionine which is produced by fermentation, which comprises 30% to 50% by weight of methionine, 20 wt% to 75 wt% dry matter content The has, N- acetyl-isoleucine less than 0.5% by weight and 0.9% to 1.3% - is characterized in that it comprises methionine.本発明は、発酵により生成されるメチオニンの結晶化母液に由来する新規の液体メチオニン組成物に関し、それは、30重量%~50重量%のメチオニンを含み、20重量%~75重量%の乾燥物質量を有し、0.5重量%未満のイソロイシン及び0.9%~1.3%のN-アセチル-メチオニンを含むことを特徴とする。
