Scientists have found out how much coffee you need to drink in the morning to improve brain function

New study, conducted in Thailand using electroencephalography (EEG) and cognitive tests, showed that 50 mg of caffeine is enough to invigorate in the morning and improve cognitive functions. This is one cup of espresso, a small can of energy drink, 250 ml of instant coffee or black tea.

Scientists have confirmed that such a dose caffeine improves well-being, increases energy levels and motivation without any adverse behavioral effects.

In their work, the study authors sought to understand whether a low dose of caffeine as a morning wake-up drink could affect brain wave activity and cognitive function. To do this, they conducted an experiment involving 25 healthy young men (mean age 21) who typically consumed one or a maximum of two cups of coffee or tea per day.

The participants were randomly divided into two groups. Both went through both the experimental study and the placebo, but in a different order. The experimental was to drink a cup of flavored water that had 50mg of caffeine added to it. In the placebo version, respectively, there was no caffeine in the water.

Neither the authors of the experiment nor the participants themselves knew when they were drinking what kind of water. 85% of the subjects could not determine the difference in taste, so the test was conducted almost blindly.

All participants had their brain activity measured before and after drinking the water, and then they performed two cognitive tests. This happened several times over several weeks. The results showed that brain activity indicative of drowsiness decreased and cognitive function improved as early as 30 minutes after taking 50 mg of caffeine.

Researchers notethat the sample in their experiment was small, and everyone received the same dose regardless of weight, which led to different concentrations of caffeine in the body. A more detailed assessment of the impact is promised to be carried out in subsequent experiments.