The present invention relates to a composition comprising polysaccharides and whey protein micelles for use in the treatment or prevention of a disorder linked to an increase in plasma postprandial insulin in a subject. The invention relates also to the non-therapeutic use of a composition comprising polysaccharides and whey protein micelles to decrease plasma postprandial insulin concentration. A further aspect of the invention is a process for forming polysaccharide-whey protein micelle complexes.