6. Walnuts

Walnuts are rich in minerals, vitamins, and antioxidants. Snacking on walnuts can increase memory, alertness, and concentration. Studies show including walnuts regularly in one's diet could help decrease the risk of Alzheimer's disease. Walnuts make a healthy snack on their own or, for a treat, add them to cookies or use them to top ice cream.

Walnut kernels in a wooden bowl and whole walnuts on table.


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