6 Things to Eat Today for a Smarter Brain Tomorrow

Salmon

Fatty fish are full of omega-3s, and new research suggests these nutrients may be essential to maintaining a youthful mind. The study, which involved MRI scans of subjects with an average age of 65, noted that the brains of those with the lowest omega-3 levels in their red blood cells appeared two years older than the brains of those with higher levels.

An alternative: walnuts.