New research is showing that exercise beneficially affects your genes, helps reverse the aging process at a cellular level, gives you more energy, makes you smarter, and may even help you grow so many new brain cells (a process called neurogenesis) that your brain actually gets bigger.

So does improving your nutrition. A diet high in sugar and saturated fat diminishes neurogenesis, whereas other foods increase it.

[Read](http://www.msnbc.msn.com/id/20746682/site/newsweek/?from=rss “Read the Story”) (Newsweek)