Fermentation broth-based animal feed supplement having elevated stability containing a) L-lysine and/or salts thereof in amount of 18 to 38 % by weight, as lysine base, relative to the total amount of the solution, b) biomass formed during fermentation in an amount of from 0 to 100 % preferably from 90 to 100 % by weight c) at least majority of the other dissolved and suspended constituents of the fermentation broth. The supplement is present in form of suspension and exhibits a pH of less than 7. it is described also a method for production thereof.Fermentation broth-based animal feed supplement having elevated stability containing a) L-lysine and/or salts thereof in amount of 18 to 38 % by weight, as lysine base, relative to the total amount of the solution, b) biomass formed during fermentation in an amount of from 0 to 100 % preferably from 90 to 100 % by weight c) at least majority of the other dissolved and suspended constituents of the fermentation broth. The supplement is present in form of suspension and exhibits a pH of less than 7. it is described also a method for production thereof.
