Method for the synthesis of kojibiose and the application thereof in the production of food and pharnaceutical compositions

[EN] The invention relates to a method for the synthesis of kojibiose, characterised by its simplicity and high yield, using a starting reaction mixture containing, as the main compound thereof, the trisaccharide 2-α-D-glucopyranosyl-lactose, O-β-D-galactopyranosyl-(1→4)-O-[α-D-glucopyranosyl- (1→2)]-β-D-glucopyranose, and leucrose, lactose, fructose, glucose and saccharose, said method comprising steps of fermentation, hydrolysis and purification, allowing the production of a disaccharide with high added value, such as kojibiose, in a cost-effective manner. The invention also relates to the kojibiose produced by means of the method according to the invention, and to the use of same in the production of prebiotic food compositions in order to prevent pathologies relating to the gastrointestinal system, and pharmaceutical compositions for treating viral-type diseases or for delaying the digestion of carbohydrates.