Alzheimer's disease may be cured by plant extract: Study Alzheimer's disease may be cured by plant extract: Study Alzheimerâs Disease And Weak Memory Can Be Improved By A Traditional Plant Medicine Claim Japanese Scientists. PTI | Updated on: 21 Jun 2017, 08:54:11 PM Alzheimer’s disease and weak memory can be improved by a traditional plant medicine claim Japanese scientists. The researchers were interested in finding active compounds for Alzheimer’s disease in Drynaria Rhizome, a traditional plant medicine. Drynaria, commonly known as basket fern, is n...