Agent for use in the case of fructose intolerance

A method of treating fructose intolerance or reducing the effects of fructose intolerance, the method comprising administering to a subject in need of such treatment or reduction a glucose isomerase, wherein said glucose isomerase is not administered in combination with 5-D-fructose-dehydrogenase.

A method of reducing in a subject at least one of (a) the bioavailability of fructose in the body of said subject, (b) the amount of fructose available to the body of said subject and (c) the amount of fructose available to intestinal bacteria colonizing in the intestine of said subject, the subject being a person who would benefit from such reducing, the method comprising administering to the subject an amount of a glucose isomerase sufficient to effect such reducing in said subject, wherein said glucose isomerase is not administered in combination with 5-D-fructose-dehydrogenase.

A method of treating a subject having a condition that is (i) caused by the intake of fructose or fructose containing foodstuffs, or (ii) due to the release of fructose in the digestive tract from other substances, wherein said condition can be treated or ameliorated by the conversion of fructose to glucose in the gastrointestinal tract of said subject by a glucose isomerase, the method comprising administering to said subject in need of such treatment a glucose isomerase, wherein said glucose isomerase is not administered in combination with a 5-D-fructose-dehydrogenase.