Evening communication in social networks delays sleep by three hours.

If a person leaves a message on social networks about an hour before his usual bedtime, then he is unlikely to go to bed in the next hour or three. And if he publishes several posts, he will fall asleep even later. This is probably due to the increase in dopamine levels - it rises when people are waiting for answers and comments from other users. It makes it difficult to relax and fall asleep. Previous studies have shown that blue light from gadgets also causes sleep problems - it interferes with the production of melatonin.