Eating well is good for your mental as well as your physical health. The brain requires nutrients just like your heart, lungs or muscles do. But which foods are particularly important to keep our grey matter happy and healthy?
Let’s see some options:
Eat oily fish
Seafood like salmon, albacore tuna, mackerel, and sardines are packed with omega-3 fatty acids that are essential for a healthy mind. About 40% of the fatty acids in brain cell membranes are DHA, one of the main omega-3 fatty acids in fish oil. Experts believe it’s probably necessary for transmitting signals between brain cells.
Bet on broccoli
Broccoli is great source of vitamin K, which is known to enhance cognitive function and improve brainpower. Researchers have reported that because broccoli is high in compounds called glucosinolates, it can slow the breakdown of the neurotransmitter, acetylcholine, which we need for the central nervous system to perform properly and to keep our brains and our memories sharp. One should keep in mind that low levels of acetylcholine are associated with Alzheimer’s. 
Apples are a very powerful brain fruit. They contain a high level of acetylcholine which is a chemical that increases movement and sensory perception. In addition, they can diminish symptoms of Alzheimer’s and improve cognitive functions. An apple a day can keep the doctor away as well as keep your brain healthy and strong. 
Eating black beans, kidney beans, lentils, white beans, and others provides a hearty dose of folate, a B vitamin that may play a role in preventing dementia later in life, according to a study in the Journal of the Academy of Nutrition and Dietetics. Canned beans are also fine; just remember to rinse them before using to remove some of the sodium. 
Make sure to include these top brain foods to your daily diet for their strong mental and memory protective benefits.
 Information based on https://www.ncbi.nlm.nih.gov/pubmed/26254971
 Information based on https://troy.blackboard.com/bbcswebdav/institution/TrojanCafe/phone/9-best-brain-foods-for-exams-and-studying.html
 Information based on http://www.consumerreports.org/food/brain-foods/