The present invention provides an AGE inhibitor and a health functional food for inhibiting an occurrence of diabetic complications. Particularly the present invention comprises a compound selected from the group consisting of mulberrofuran G mulberrofuran K kuwanon G kuwanon Z oxyresveratrol 2` 4` 5 7 tetrahydroxyflavanone morusignin L and dihydromorin isolated from Morus Bark as an active ingredient. The compounds disclosed above inhibit the production of AGE which is a causative substance of diabetic complications. Thus the compounds could be used as an AGE inhibitor and a health functional food for inhibiting diabetic nephropathy diabetic retinopathy and diabetic neuropathy.
