No evidence drugs, vitamins, supplements help prevent cognitive decline in healthy older adults

... age, but not enough to interfere with daily activities. The annual rate of decline into dementia, such as Alzheimer's disease, is about 10 per cent. Given that rate and the aging population, it's estimated the number of Canadians with dementia will ...

http://www.eurekalert.org/pub_releases/2013-04/smh-ned041513.php