> People talk about how staying active helps stave off dementia, but what does this actually do? IIRC -- based on Bill Bryon's "The Body" -- there some good ev

> People talk about how staying active helps stave off dementia, but what does this actually do? IIRC -- based on Bill Bryon's "The Body" -- there some good evidence that this is a result of bone density, as bones produce hormones that may be important in whether Alzheimer's develops. There's been some fairly recent research in this area. It's important to note that I don't believe any of the available research establishes a causal link one way or the other, so it's possible that Alzheimer's causes a loss of bone density or that they're both caused by an underlying shared factor; but bone density is correlated with dementia!