Even one cup of espresso in the morning improves brain function.

To cheer up in the morning and improve cognitive functions, it is enough to consume 50 milligrams of caffeine. This is the equivalent of a cup of espresso, a small can of energy drink, 250 milliliters of instant coffee or black tea. Drinking caffeinated drinks in the morning in just half an hour improves memory, attention and hand-eye function, and also reduces the activity of alpha waves associated with sleepiness in the brain.