I’ve recently read in the news about various preventative treatments for Alzheimer’s disease (e.g. , increasing Vitamin D intake to quitting smoking). Is there any truth to these? Do preventative treatments exist? What are they?

Eric R. Kandel, M.D. - Brain and behavior research expert on alzheimer's

There is no reason to believe that any of the recommendations that you have described are of particular use in Alzheimer's disease. There is a suggestion that increased intellectual activity and physical excercise may be helpful. Studies in this are show ecouraging trends, even if not yet fully proven.