An antiwrinkle agent, lipolysis promoter, external composition for skin, and food and beverage composition having for an active ingredient thereof a compound represented by general formula (1): (wherein R represents a hydrogen atom or an acyl group having 2 to 20 carbon atoms) or an extract obtained from guinea ginger and/or an acylation treatment product of said extract.以一般式(1)[式中,R係氫原子或碳原子數為2至20個之醯基]。;所表示之化合物,或得自非洲豆蔻(Aframomum melegueta)之萃取物及/或該萃取物之醯化處理物為有效成份之皺紋改善劑、促進脂肪分解劑、皮膚外用組成物及飲食用組成物。