Improve your odds.
(Jeffrey MacMillan for USN&WR)
We all want to dodge the Alzheimer's bullet. And lucky us, Mother Nature has counterbalanced the power of our hard-wired genes by allowing multiple lifestyle choices to greatly influence our aging. Read: Your destiny is not fated; you do have some control. Yes, genes are powerful forces, but they "are not even the dominant factor" for the vast majority of people, says Paul Thompson, professor of neurology at the University of California-Los Angeles School of Medicine. Here are some actionable factors that can help your brain stay healthy over the long term.