Clinically there is no such thing as what you eat for fast brain response, but the Mediterranean diet, coffee, green tea, and curry have some brain-protective effects. In addition you can improve brain function by playing puzzle games or doing sports that require brain cooperation. The Mediterranean diet is characterized by a high consumption of fruits, vegetables, legumes, grains, fish, olive oil as the main source of fats and oils, moderate consumption of alcohol, and small amounts of red meat and dairy products. The Mediterranean diet helps slow the rate of cognitive decline and reduces the incidence of Alzheimer’s disease. Coffee, green tea, and curry also have some brain-protective effects. The brain can also be exercised in all aspects of life, such as exercise and puzzle tests. Through Sudoku, Rubik’s Cube and some other puzzle games, not only can make the brain more logical, but also improve the brain’s reaction speed. Doing ping pong, badminton, basketball, soccer and other sports on a regular basis can help to improve the brain’s reaction speed and flexibility, improve the brain’s excitability, and prevent depression, therefore also preventing the decline of the brain’s reaction speed. It is important to note that slow brain reaction time may also be a manifestation of diseases, such as Alzheimer’s disease and vascular dementia. If you find that the brain reaction speed slows down, you need to consult a doctor in time for diagnosis, and you can train through the above methods after ruling out the cause of the disease.