Prevention of diabetes and / or diabetic nephropathy, amelioration, or therapeutic composition

Problem hardly occurs, such as side effects, prevention of highly safe diabetes and / or diabetic nephropathy, to provide an improved or therapeutic composition. [1] degraded galactomannan, indigestible dextrin, polydextrose, inulin, arabinogalactan, corn fiber, water-soluble soybean polysaccharide, psyllium, and one or more selected from the group consisting of low molecular weight sodium alginate containing dietary fiber and / or polyphenolic compounds, prevention of diabetes and / or diabetic nephropathy, ameliorating or therapeutic composition.