Researchers divided more than 600 Alzheimer's patients into three groups. One group received a dose of vitamin E, another received medication, and a third received a placebo. Over the next two years, with Compared with patients who took placebo, patients who took vitamin E had a slower decline in their ability to plan, cook, and shop in daily activities.Patients taking the drug did not achieve similar clinical effects. 
The daily vitamin E required by the normal human body can be ingested from the diet without additional supplements.
 the researchers believe that vitamin E supplements may become a cure for Alzheimer's disease.