High dose B vitamins help prevent Alzheimer's say researchers

The research by Douaud et al published in the Proceedings of the National Academy of Sciences found that this part of the brain shrank more slowly in people with mild cognitive impairment when they took B vitamins.

To reach these conclusions, the researcher gave 156 elderly people with mild cognitive impairment, the stage before dementia or Alzheimer's, a combination of vitamin B12 (500 mcg), B6 (20mg) and folic acid or placebo pills over a two year period.