ALDOSE REDUCTASE INHIBITOR

摘要

To prevent or treat diabetic complications, it is intended to provide an aldose reductase inhibitor which is highly safe, suffers from no problem in stable supply, is satisfactory in compliance and can be continuously taken in daily life. Namely, an aldose reductase inhibitor which contains, as the active ingredients, ellagic acid and other natural-origin substances contained in a solvent extract of a plant belonging to the genus Quercus of the family Fagaceae such as oak.