The invention relates to a method for producing a fructose composition comprising the following successive stages: provision of an initial composition comprising glucose; concentration of the initial composition by evaporation of water to obtain a concentrated initial composition; isomerization of glucose to fructose from the concentrated initial composition, making it possible to obtain an intermediate composition; purification of the intermediate composition in a multicolumn chromatography system, making it possible to obtain a glucose-rich raffinate and a fructose-rich extract; concentration of the extract by evaporation of water; wherein the intermediate composition is not subjected to a concentration step by evaporation of water between the isomerization step and the purification step.

The invention relates to a method for producing a fructose composition comprising the following successive stages: provision of an initial composition comprising glucose; concentration of the initial composition by evaporation of water to obtain a concentrated initial composition; isomerization of glucose to fructose from the concentrated initial composition, making it possible to obtain an intermediate composition; purification of the intermediate composition in a multicolumn chromatography system, making it possible to obtain a glucose-rich raffinate and a fructose-rich extract; concentration of the extract by evaporation of water; wherein the intermediate composition is not subjected to a concentration step by evaporation of water between the isomerization step and the purification step.