Many nuts, such as flax seeds, pumpkin seeds, and chia seeds, are great for brain health, but the best kinds of nuts are walnuts. Walnuts are a great source of protein and healthy fat that help keep blood sugar levels balanced and manage cleaner arteries.They have omega-3s which have a good effect on mood while decreasing anxiety and depression. In turn, consuming them daily will lead to better optimism, energy, hope, and focus.