Chocolate choco beans small molecules, which is known as flavonol improve your brain ability. Try to consume only dark chocolates not white.
Oranges are high in flavonoids and also in vitamin c. You should consume unadulterated fresh orange juice because it improves your cognitive function.
It gives many benefits because of its ingredients which added into tea like clove, ginger, black pepper etc. A study found tea drinkers have the advantage over non- drinkers.
It has omega-3 fatty acids and vitamin E which gave benefits to the heart, brain, skin, hair health. Add fish to your diet to improve your brain health (especially for brain cells).
Most people recommend adding green vegetables to your diet because they have different nutrients and health benefits. You can eat kale, Broccoli, Spinach etc.