Kyung-An Han

Well, actually, caffeine has been used by people, athletes, to enhance their physical performance as well.

So when caffeine acts on muscle, it increases production of ATP.

So it is known as actually performance enhancer.

Obviously, it's not really like other illegal kind of enhancer, but nonetheless, it has been helpful to some individuals.

And obviously, it is also cognitive enhancer as well, too, meaning it tends to increase your attention to the task.

More importantly, it makes you be awake.

So whenever you need to study last minute for final exam or whether you need to work at night for night shift workers, this will help people to be awake.

In that sense, it's really helpful.

But like everything, every chemical that we intake, too much is always detrimental.

But what we demonstrate is that also time of day is also critical as well, too.

In our study,

Drinking coffee during the daytime could be bad because it will make you not sleeping well because it reduces sleep time as well as quality of sleep.

But nonetheless, people sleep.

But one drink coffee at night, I don't know.

I do have a really good experience with it, too.

I had to drink a lot of coffee to finish my proposal.

And then that was at work.

When I drove home, I had strong urge to drive through yellow light.

I mean, this is exactly what food flies do.

So when they get coffee at night, but not during the daytime, they become a little more impulsive.