Why can't you sleep after drinking coffee?

After getting up in the morning, have a drink to wake your head up and swallow a light gulp during the day at work, but many people have the experience of being too excited to sleep after drinking coffee at night. What on earth is going on?

This is because there is a conductive substance called adenosine in the body, which controls nerve activity, slows breathing, weakens mood, reduces gastric acid secretion and has diuretic effects. On the other hand, caffeine will fake adenosine, making the body think that the effect of adenosine has taken place, making you feel energetic, increased stomach acid, urinate more frequently, and naturally less willing to fall asleep. It is worth noting that the brief awakening caused by this caffeine does not mean that physical strength is really restored. In addition, everyone's sensitivity to caffeine varies according to their metabolic rate, so some people don't feel that sleep (sleep food) is affected after drinking coffee.