1. A liquid composition of methionine obtained from the mother liquor of crystallization of methionine obtained by fermentation, characterized in that it comprises from 30% to 50% by weight of methionine, and in that the solids content is from 20% to 75% by masse.2. Composition according to Claim. 1, characterized in that it contains less than 0.5% by weight of isoleucine and from 0.9% to 1,3% N-acetyl-metionina.3. Composition according to Claim. 1, characterized in that the content of amino acids other than methionine and isoleucine is from 7% to 10% by masse.4. A composition according to claim. 2, characterized in that the content of amino acids other than methionine and isoleucine is from 7% to 10% by masse.5. Composition according to claim. 1, characterized in that the sugar content is less than 5% .6. Composition according to claim. 2, characterized in that the sugar content is less than 5% .7. Composition according to claim. 3, characterized in that the sugar content is less than 5% .8. A composition according to claim. 4, wherein the sugar content is less than 5% .9. A process for preparing a composition according to any one of claims. 1-8 of the fermentation medium methionine-producing microorganism, characterized in that it comprises the following steps: a. purification of the fermentation medium and the removal of insoluble and soluble organic impurities from said fermentation medium, b. optionally demineralization purified fermentation broth to remove cations and anions from said fermentation medium, c. methionine crystallization from a liquid solution thus obtained and extraction of the crystallization mother solution, d. adjusting pH crystallization mother liquor solution to a value pH pKa2 methionine, e. optionally, filtering and concentrating said solution, and f. of1. Жидкая композиция метионина, полученного из маточного раствора кристаллизации метионина, полученного ферментацией, отличающаяся тем, что содержит от 30%
