4. Walnuts

Walnuts do not only look like brains and offer essential nutrients, they specifically nourish the brain and boost mental function. Research suggests that taking walnuts could be one of the best things that you can do to make sure optimal brain health.

Walnuts are packed with omega-3 fatty acids and are one of the richest foods with polyunsaturated fatty acids that could help keep a healthy brain. A synergy of omega-3 and antioxidants in walnut may be the reason for its brain boosting power.