by Ok, experts agree that drinking more than 400 mg caffeine per day may not be great for us.
In general, however, it seems that those who adhere to a moderate amount (less than four cups) per day could actually see some advantages for their heart health, their diabetes protection and even their longevity.
And now a study published in the communication biology showed that caffeine that can be found in tea and coffee can lead to some brain changes in sleep – especially during sleep outside the RAM level of Rapid Eye Movement (REM).
Caffeine was associated with an increased complexity of the brain in sleep
The study examined 40 healthy adults between the ages of 20 and 58.
Using electrodes on the scalp (EEGS) they were monitored in two nights of sleep: once without caffeine and another time with 200 mg (about two cups worth coffee) caffeine in their system.
After analyzing the results with a combination of statistical analysis and AI, they found that caffeine increased the complexity of the brain during sleep, in particular non-REM sleep, as well as “criticism”.
Philipp Thölke, the first author of the study, said: “The results showed that caffeine increased the complexity of brain signals and reflects a more dynamic and less predictable neuronal activity, especially during the non -quick eye movement (NREM), which is important for memory consolidation and cognitive recovery of the cognitive recovery of crucial importance.”
The sleep researcher Professor Julie Carrier, who was involved in research, added: “Caffeine stimulates the brain and presses it into a state of criticism in which it is more alert, vigilant and reactive.
“Although this is useful during the day, this state could affect calm at night: the brain would neither relax nor recover properly.”
Younger people seemed to be more affected than middle -aged people.
Does that mean coffee harms my sleep?
The researchers found that it is associated with delayed, flatter and “more active” sleep, especially in the phases in which their brain would normally settle in its most restorative cycle.
Professor Jerbi said: “This change in the rhythmic activity of the brain can explain why caffeine influences efficiency with which the brain recovers during the night with potential consequences for memory processing.”
And Professor Carrier announced that “caffeine stimulates the brain and it pushes it into a state of criticism in which it is more alert, vigilant and reactive. This is useful during the day for concentration, this state could affect the peace in the night: the brain would neither relax nor relax.”
But these researchers gave healthy people caffeine shortly before they went to bed (three hours and then an hour earlier). This does not necessarily show you what would happen if you had coffee during the day.
The scientists say they are enthusiastic about what further studies on the topic will reveal in the future, especially with regard to the use of change during the day.
