Nuts, and walnuts, in particular, will help prevent you from going nutty too soon. As a vitamin E and healthy fat source, they help prevent your brain from declining and working more slowly. A study in the American Journal of Epidemiology found that eating nuts every day along with other high vitamin E sources helped prevent cognitive deterioration. Clear thinking is important for productivity.
The corollary appears to be that even if you’re not old, munching on a few of these every day can help keep your brain sharp. If you make it a habit, you’ll decrease your chances of getting Alzheimer’s or Parkinson’s. Because they are also dense with minerals, vitamins, and antioxidants, they will help rid your brain matter of toxins and stop your actual brain cells from aging too quickly. On the whole, you’ll also benefit from their ability to keep your immune system strong and your skin firm and glowing.