Any foods that are rich in omega 3 essential fatty acids is great for improving your brain health and brain function.
Fish has always been known as a brain food since it contains the Omega 3 fatty acids and that's especially true for any deep water fish such as Salmon.
Salmon is the best fish to eat for giving nutrients to your brain to improve your brain health and function.
Flavonoids and Vitamin E based foods are good for nutrients for your brain.