The present invention relates to a novel liquid methionine composition, originating from the mother liquor from crystallization of methionine produced by fermentation, comprising between 30 and 50% by weight of methionine and having a dry matter comprised between 20% and 75% by weight and characterized in that it also comprises less than 0.5% by weight of isoleucine and between 0.9% and 1.3% of N-acetyl-methionine.
