VIDEO New Study: Participating in certain mental activities, like reading magazines or crafting in middle age or later in life, may delay or prevent memory loss. Watching TV won't.

VIDEO + ARTICLE New research in the British Medical Journal delivers a striking conclusion. "Our results suggest that inhaling other people's smoke may damage the brain, impair cognitive functions such as memory, and make dementia more likely."

The price of alcohol relative to income has halved since the 1960s, while per capita consumption has nearly doubled. Psychiatrists warn of a surge in alcohol-related dementia.

A new study reveals that people with larger stomachs in their 40s may be as much as 3 times more likely to have dementia when they reach their 70s.

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People who have a tendency to be self-disciplined, careful, and purposeful appear less likely to develop Alzheimer’s disease, according to a study published in the Archives of General Psychiatry.